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Every calculator on Toolybird, filterable by category.
Calculate ABV from original and final gravity readings. Get alcohol by volume, apparent attenuation, and calorie estimates for beer, wine, and mead.
Baking & CookingConvert any oven recipe to air fryer time and temperature. Drop 25°F and 20% of the time with one click. Works in Fahrenheit and Celsius.
Baking & CookingFind the right grill size for your crowd. Enter guests to get the cooking area you need in square inches, plus burner and grill type guidance.
Baking & CookingCalculate exact salt, Prague Powder #1, and sugar for dry-curing bacon at home. Food-safe ratios by meat weight with cure times and safety tips.
Baking & CookingConvert any bread recipe to baker's percentages instantly. Enter flour and ingredient weights to get hydration, salt, and yeast percentages. Free, no signup.
Baking & CookingFind common baking substitutions for buttermilk, eggs, butter, flour, sugar, and more. Quick reference guide for when you're missing an ingredient.
Baking & CookingCalculate bread hydration percentage and baker's percentages for any bread recipe. Find the right flour-to-water ratio for your dough.
Baking & CookingCalculate sandwich spreads for any crowd: butter, cream cheese, jam, mayo, peanut butter. Enter sandwiches, get exact amounts.
Baking & CookingCalculate the exact salt, sugar, and water for wet or dry brines. Get equilibrium brine percentages and timing for turkey, chicken, and pork.
Baking & CookingConvert butter between sticks, cups, tablespoons, teaspoons, ounces, and grams instantly. US stick standards with a full conversion chart.
Baking & CookingCalculate exactly how much buttercream you need to fill, crumb coat, and frost any cake size. No more running short or wasting frosting.
Baking & CookingCalculate cups of batter needed for any pan size and how full to fill it. Scale recipes up or down with confidence. Free, no signup.
Baking & CookingConvert cake batter between pan sizes by area. Enter your recipe's pan and target pan to get the exact batter multiplier and baking time adjustment.
Baking & CookingPrice your cakes with a real cost-plus formula. Enter ingredients, hours, packaging, and overhead to get a profitable selling price.
Baking & CookingFind servings for any cake pan: wedding slices (1x2 in) and party slices. Enter your guest count to get the right pan size instantly.
Baking & CookingFind out how many servings any round, square, or sheet cake yields. Get cutting guides for party and wedding slice sizes.
Baking & CookingGet exact chocolate-to-cream ratios for ganache: 2:1 dark for truffles, 1:1 for glaze, plus milk and white chocolate ratios. By weight.
Baking & CookingDial in your coffee with precise brew ratios. Calculate coffee and water for pour over, French press, espresso, and cold brew.
Baking & CookingFind the caffeine in your coffee by drink type and size. Covers drip, espresso, cold brew, latte, instant, tea, and decaf with daily limit guidance.
Baking & CookingSee how long your coffee keeps working. Enter caffeine mg and time to get a half-life timeline showing what is still in your system.
Baking & CookingGet the perfect coffee strength every time. Enter cups and pick a brew ratio from 1:15 to 1:18 to get exact coffee grams and water.
Baking & CookingConvert coffee ratios between 1:X, grams per liter, tablespoons per cup, and ounces. Dial in strength for any brew method instantly.
Baking & CookingMake perfect cold brew concentrate at 1:4 or ready-to-drink at 1:8. Get exact coffee grams, water, steep time, and dilution servings.
Baking & CookingConvert cooking measurements instantly: teaspoons, tablespoons, cups, fluid ounces, pints, quarts, gallons, and milliliters. US kitchen standards.
Baking & CookingConvert cups to pounds, ounces, and grams for 24 baking ingredients with real density data. Flour, sugar, butter, honey, and more.
Baking & CookingCalculate the exact water temperature needed to hit your target dough temperature. The pro baker formula for consistent fermentation.
Baking & CookingConvert dry pasta to cooked cups and servings instantly. 2 oz dry makes 1 cup cooked. Plan the right amount per person, no waste.
Baking & CookingGet exact boiling times for soft, jammy, medium, and hard boiled eggs. Adjusts for egg size, starting temperature, and altitude.
Baking & CookingConvert between jumbo, large, medium, and small eggs. Get exact counts and weights so your recipe stays balanced. Free, no signup.
Baking & CookingCalculate exactly how much fondant you need to cover round or square cakes. Includes rolling thickness and draping allowance.
Baking & CookingConvert fresh herbs to dried and back with the 3:1 rule. 1 tablespoon fresh equals 1 teaspoon dried. Works for basil, oregano, thyme, and more.
Baking & CookingConvert garlic between cloves, teaspoons, tablespoons, heads, grams, garlic powder, and minced jar garlic. Never guess at garlic math again.
Baking & CookingConvert grams to US cups for flour, sugar, butter, honey, and 20 more ingredients with real density data. Exact baking conversions.
Baking & CookingConvert grams to tablespoons for any ingredient. Flour, sugar, butter, honey, salt, oil and more with real density data. Free and instant.
Baking & CookingConvert grams to teaspoons and tablespoons for salt, sugar, baking soda, spices, and 15 more ingredients with real density data.
Baking & CookingCalculate ham cooking time and temperature by weight and type: spiral, bone-in, boneless, fully cooked or raw. USDA-safe temps included.
Baking & CookingFind out exactly how much ham to buy per person for holidays, parties, and buffets. Bone-in, boneless, and appetizer portions covered.
Baking & CookingPlan ice cream for parties: 1 quart serves 5-8. Enter guests to get quarts, gallons, and cones needed. Never run out mid-party.
Baking & CookingConvert milliliters to grams for 20 cooking ingredients with real density data. Water, oil, honey, flour, milk, and more.
Baking & CookingCalculate how many potatoes to buy for mashed potatoes, plus butter, milk, and cream amounts. Perfect portions for weeknights or holidays.
Baking & CookingUSDA-safe internal temperatures for beef, pork, chicken, turkey, and fish. Includes carryover cooking adjustments and rest times.
Baking & CookingCalculate molecular SO2 in wine from pH and free SO2. Check protection targets for whites, reds, and sweet wines with real wine chemistry.
Baking & CookingSubstitute oil for butter and butter for oil with the 3:4 rule. 1 cup butter equals 3/4 cup oil. Works in cups, sticks, and grams.
Baking & CookingFind the right pan size substitution when you don't have the pan a recipe calls for. Compare volumes of round, square, rectangular, and springform pans.
Baking & CookingScale a classic fluffy pancake recipe to any number of pancakes. Get exact flour, milk, egg, and butter amounts instantly.
Baking & CookingTime your pancakes to golden perfection. Flip timing, griddle temperature, and doneness cues for fluffy pancakes every batch.
Baking & CookingCalculate pizza dough like a pro: flour, water, salt, and yeast for any number of pizzas at 60-70% hydration. Ball weights included.
Baking & CookingCalculate pizza dough by size: flour, water, yeast, salt, and oil in grams for 10 to 16 inch pizzas. Baker's percentages included.
Baking & CookingFind out how many pizzas to order for your party. Accounts for adults, kids, slices per pizza, and appetite levels. Never run short.
Baking & CookingCompare pizza sizes by true area and price per square inch. Learn whether two medium pizzas beat one large, with exact math.
Baking & CookingPlan popcorn for movie night: 1/4 cup kernels makes 7 cups popped. Enter guests to get kernels, oil, and salt amounts for the batch.
Baking & CookingConvert pounds to cups for flour, sugar, butter, rice, and 20 more ingredients. Accurate density-based kitchen conversions, free.
Baking & CookingCalculate exact priming sugar for bottle conditioning by batch size, temperature, and CO2 target. Corn sugar, table sugar, and DME supported.
Baking & CookingCalculate the exact ingredient cost of any recipe. Enter amounts and package prices to get cost per batch and per serving.
Baking & CookingScale any recipe to more or fewer servings instantly. Enter ingredients and scale to any multiple. Preserves ratios for baking and cooking recipes.
Baking & CookingGet the right rice to water ratio for white, jasmine, basmati, and brown rice. Cups in, perfect rice out, stovetop or rice cooker.
Baking & CookingBuild your salad ingredient by ingredient and get an honest calorie count. Greens, proteins, toppings, and dressings with real data.
Baking & CookingMake self-rising flour from all-purpose flour: 1 cup AP + 1.5 tsp baking powder + 1/4 tsp salt. Exact amounts for any quantity.
Baking & CookingBuild sourdough bread with baker's percentages. Flour, water, starter, and salt for any loaf count, size, and hydration level.
Baking & CookingCalculate exact flour and water for any sourdough feeding ratio. Plan levain builds and feeding schedules that fit your bake day.
Baking & CookingGet steak grill time per side by thickness and doneness, with pull temps and rest times. Rare to well done, backed by USDA guidance.
Baking & CookingIdentify any sugar syrup stage from temperature. Get the exact range for thread, soft ball, hard crack, and caramel in F and C.
Baking & CookingCalculate potassium metabisulfite additions for wine in grams and teaspoons. Hit your free SO2 target by batch size in gallons or liters.
Baking & CookingGet the perfect water temperature and steep time for green, black, oolong, white, and herbal tea. Never brew bitter tea again.
Baking & CookingAdd up your Thanksgiving dinner plate: turkey, stuffing, sides, pie, and drinks. See the real calorie total of the big meal.
Baking & CookingCalculate turkey roasting time by weight at 325°F or 350°F, stuffed or unstuffed. Get total time, oven-in time, and rest guidance.
Baking & CookingCompare turkey defrosting methods: refrigerator, cold water, and microwave. Get safe thaw times by weight for each method.
Baking & CookingCalculate roasting time and temperature for any turkey weight, stuffed or unstuffed. Includes rest time and food-safety guidance.
Baking & CookingFind the right turkey size for your guest count: 1 lb per person, 1.5 with leftovers. Includes thaw time and serving counts.
Baking & CookingEnter your turkey weight and serving date to find exactly when to move it to the fridge. USDA-safe refrigerator thaw planning.
Baking & CookingConvert uncooked rice to cooked cups and servings instantly. 1 cup dry white rice makes 3 cups cooked. Works in both directions.
Baking & CookingEstimate how long hot water takes to cool to your target temperature. Newton's law cooling for tea, brewing, and baby formula.
Baking & CookingConvert between active dry yeast, instant yeast, and fresh yeast quantities. Get exact substitution amounts for any bread or pizza dough recipe.
Baking & CookingSolve the Arrhenius equation for rate constant, activation energy, or temperature. Compare reaction rates at different temperatures.
ChemistrySolve Avogadro's law V1/n1 = V2/n2 for any variable. Find gas volume from moles at constant temperature and pressure. Free, no signup.
ChemistryCalculate Boyle's Law (P1V1=P2V2) for gases at constant temperature. Solve for pressure or volume when any three variables are known.
ChemistryCalculate the pH of buffer solutions from Ka, acid concentration, and conjugate base concentration with the Henderson-Hasselbalch equation. Free.
ChemistryCalculate Charles's Law for gases. V₁/T₁ = V₂/T₂ at constant pressure. Find final volume or temperature when gas is heated or cooled.
ChemistryBalance chemical equations automatically using the algebraic method. Enter your unbalanced equation and get the balanced result instantly. Free.
ChemistryCalculate boiling point elevation and freezing point depression. Find molality, van t Hoff factor effects, and new phase change temperatures.
ChemistrySolve the combined gas law P1V1/T1 = P2V2/T2 for any unknown variable. Calculate final pressure, volume, or temperature when conditions change.
ChemistryCalculate dilution problems using M1V1=M2V2. Find the volume of stock solution needed or the final concentration after dilution. Essential for lab work.
ChemistryUse Faraday's law to calculate mass deposited, charge, current, or time in electrolysis. Covers electroplating and metal refining.
ChemistryGet the full and noble-gas electron configuration for any element. Includes orbital diagrams and valence electrons. Free, no signup.
ChemistryCalculate the empirical formula of a compound from percent composition data. Enter the percentage of each element to find the simplest whole-number ratio.
ChemistryCalculate Kc and Kp from equilibrium concentrations or pressures. Compare Q to K to predict reaction direction. Free, no signup.
ChemistryCalculate formal charges on every atom in a Lewis structure. Identify the most stable resonance form instantly. Free, no signup.
ChemistrySolve Gay-Lussac's law P1/T1 = P2/T2 for pressure or temperature changes at constant volume. Includes aerosol can safety examples.
ChemistryCalculate Gibbs free energy change (ΔG) from enthalpy (ΔH), entropy (ΔS), and temperature. Determine if a reaction is spontaneous.
ChemistryCalculate the standard enthalpy of reaction using Hess's Law and standard enthalpies of formation. Enter reactants and products with coefficients. Free.
ChemistryCalculate buffer solution pH using the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]). Essential for biochemistry and analytical chemistry.
ChemistryApply Hess's law to find reaction enthalpy from step enthalpies. Handles reversing and scaling of thermochemical equations.
ChemistrySolve the ideal gas law PV=nRT for any variable. Enter pressure, volume, temperature, or moles and calculate the missing quantity instantly.
ChemistryCalculate the solubility product constant (Ksp) from ion concentrations, or find ion concentrations from Ksp. For solubility equilibrium. Free.
ChemistryFind the limiting reagent in a chemical reaction from reactant masses and molar masses. Calculate theoretical yield and excess reactant amounts.
ChemistryCalculate molality from moles of solute and kilograms of solvent. Useful for boiling point elevation and freezing point depression problems. Free.
ChemistryCalculate the molar mass of any chemical compound instantly. Enter a chemical formula like H2O, NaCl, or C6H12O6 and get the molecular weight in g/mol.
ChemistryCalculate molarity (M) from moles of solute and volume of solution. Solve for any variable: moles, volume, or molarity. Essential for lab preparation.
ChemistryCalculate the molecular formula from the empirical formula and molar mass. Find the whole-number multiple that gives the true molecular formula.
ChemistryCalculate cell potential under nonstandard conditions with the Nernst equation. Supports any temperature and electron count.
ChemistryCalculate oxidation numbers for elements in common compounds and ions. Includes rules for assigning oxidation states and examples for practice.
ChemistryApply Dalton's law of partial pressures. Find each gas's partial pressure from mole fractions or total pressure. Free, no signup.
ChemistryCalculate the percent composition by mass of each element in a chemical compound. Enter the formula for a full mass-percentage breakdown. Free.
ChemistryCalculate percent yield from actual and theoretical yield. Find theoretical yield or actual yield. Essential for lab reports and chemistry class.
ChemistryCalculate stoichiometry for any balanced chemical equation. Convert between grams and moles for reactants and products using mole ratios.
ChemistryCalculate the pH of any strong acid solution instantly. Enter molar concentration of HCl, HNO3, H2SO4 or others to find the exact pH. Free.
ChemistryCalculate theoretical yield from reactant masses and the balanced equation. Compare with actual yield for percent yield.
ChemistrySolve titration problems: find unknown molarity, required volume, or equivalence point pH for strong and weak acid-base titrations.
ChemistryCalculate vapor pressure at any temperature using the Clausius-Clapeyron equation. Predict boiling points at altitude. Free, no signup.
ChemistryCalculate the pH of strong base solutions like NaOH or KOH. Enter molarity to get pH, pOH, and hydroxide concentration instantly.
ChemistryCalculate the pH of a weak acid solution using Ka and initial concentration. Includes percent dissociation and equilibrium concentrations. Free.
ChemistryCalculate the pH of a weak base solution using Kb (base dissociation constant) and initial concentration. Includes pOH and percent dissociation.
ChemistryConvert between pH, pOH, hydrogen ion and hydroxide ion concentrations instantly. Includes acidity classification. Free, no signup.
ChemistryConvert angles between degrees, radians, gradians, arcminutes, and arcseconds instantly. Includes a common-angle quick reference table.
Unit ConvertersConvert acres to square feet, hectares to square meters, and square miles to km2 instantly. Built for land, real estate, and floor plans. Free.
Unit ConvertersEnter any two of width, height, or aspect ratio to solve for the third. Includes presets for 16:9, 4:3, 1:1, 9:16, and 21:9.
Unit ConvertersConvert clothing sizes between US, UK, and EU for men's and women's tops. Includes the full conversion chart and a vanity sizing warning. Free, no signup.
Unit ConvertersConvert US cups to grams and back for 50+ baking ingredients using real density data. Flour, sugar, butter, honey, and more.
Unit ConvertersConvert between bytes, KB, MB, GB, TB and PB. Explains binary vs decimal and why your 1TB drive shows as 931GB. Free, no signup.
Unit ConvertersConvert internet speeds between Mbps, MB/s, Gbps, kbps, and more. Finally understand the bits vs bytes confusion in ISP advertising.
Unit ConvertersConvert energy between joules, calories, kilocalories, kWh, BTU, and electronvolts. Great for nutrition labels, utility bills, and physics.
Unit ConvertersConvert GPS coordinates between decimal degrees and degrees-minutes-seconds (DMS). Get copy-ready output for Google Maps.
Unit ConvertersConvert human height between feet/inches and centimeters. Enter 5 ft 9 in or 175 cm and get the instant equivalent. Free, no signup.
Unit ConvertersConvert miles to kilometers, feet to meters, inches to cm and more, with runner distance and height presets. Free, no signup.
Unit ConvertersConvert between US MPG, UK MPG, L/100km and km/L. Compare fuel costs for any trip or car comparison with live results. Free, no signup.
Unit ConvertersConvert numbers to written English words instantly. 1,234 becomes "one thousand two hundred thirty-four". Perfect for checks and legal documents.
Unit ConvertersConvert oven temperatures between Celsius, Fahrenheit, and Gas Mark instantly. Includes a cooking temperature guide for roasting, bread, and pizza. Free.
Unit ConvertersLook up international A-series and US paper sizes (Letter, Legal, Tabloid) with dimensions in mm, cm, and inches. Free, no signup.
Unit ConvertersConvert power between watts, kilowatts, horsepower (mechanical, metric, electrical), and BTU per hour instantly. Free, no signup.
Unit ConvertersConvert pressure between PSI, bar, kPa, atm, mmHg, and inHg. Includes tire pressure presets for cars and bikes. Free, no signup.
Unit ConvertersConvert ring sizes between US, UK, EU (mm), and Japanese systems instantly. Includes the full conversion chart and an at-home measuring guide. Free.
Unit ConvertersConvert numbers to Roman numerals and Roman numerals back to numbers, with validation of proper numeral form. Free, no signup.
Unit ConvertersConvert running pace between min/km, min/mile, km/h, and mph. Predict finish times for 5K, 10K, half marathon, and marathon.
Unit ConvertersConvert shoe sizes between US, UK, EU and Mondopoint for men, women and kids. Includes an at-home foot measuring guide. Free, no signup.
Unit ConvertersConvert MPH to km/h, m/s to MPH, and knots to MPH instantly. Built for driving, running, cycling, and boating with live results. Free.
Unit ConvertersConvert Celsius, Fahrenheit, and Kelvin with three live inputs. Type in any scale and the other two update instantly. Great for cooking and science. Free.
Unit ConvertersConvert time between nanoseconds, milliseconds, seconds, minutes, hours, days, weeks, months, and years with live results.
Unit ConvertersConvert gallons to liters, cups to ml, pints to quarts and more, with instant live results. Built for cooking, beverages, and fuel math. Free, no signup.
Unit ConvertersConvert kilograms to pounds, grams to ounces, and stone to pounds instantly. Built for recipes, luggage limits, and gym plates. Free, no signup.
Unit ConvertersEncode text or data to Base64, or decode Base64 strings back to readable text. Supports UTF-8 text, URLs, and binary data encoding. 100% client-side.
DeveloperFormat minified or messy CSS into clean, readable, consistently indented code. The perfect companion to our CSS Minifier.
DeveloperBuild layered CSS box shadows with visual sliders for offset, blur, spread, color, and inset. Live preview plus copyable CSS output.
DeveloperMinify CSS by removing whitespace, comments, and redundant code. Or beautify minified CSS for readability. Free online CSS compressor tool.
DeveloperCompare CSS selectors and get the specificity triple (a, b, c) with a per-part breakdown and a clear winner. Handles IDs, classes, :not(). Free.
DeveloperCalculate Linux chmod permissions: click the 9 permission bits or pick a preset to get the octal number, symbolic form, and shell command. Free.
DeveloperPick a color and preview how it looks with protanopia, deuteranopia, and tritanopia. Includes WCAG contrast ratios for accessible design. Free.
DeveloperBuild cron schedules visually, or paste any expression to get a plain-English explanation plus the next 10 run times. Free, no signup.
DeveloperEstimate how long any file takes to download. Enter file size and connection speed, use one-touch presets for 5G, fiber, cable, DSL, 4G. Free.
DeveloperTurn a Unix timestamp into dates across time zones (UTC, New York, London, Karachi, local) or convert a date back to epoch. Shows ISO 8601. Free.
DeveloperCheck password strength with live scoring, estimated crack time, and specific suggestions. Runs 100% in your browser, nothing sent or stored. Free.
DeveloperCreate QR codes for URLs, WiFi, vCards and text. Generated 100% on your device, never expire, no tracking redirects. Free, no signup.
DeveloperParse any URL into its parts: protocol, host, port, path, query parameters (decoded), and fragment. Free online URL parser, no signup.
DeveloperEncode HTML special characters to entities or decode entities back to characters. Prevents XSS and display issues. Named and numeric entities. Free.
DeveloperMinify HTML online: remove comments, collapse whitespace, and shrink file size. Protects pre, textarea, script, and style content. Free, no signup.
DeveloperConvert rich HTML into clean Markdown. Paste from web pages or editors; get normalized headings, lists, links, and code blocks.
DeveloperConvert hex color codes to RGB, HSL, and HSB values instantly. Pick any color and get all formats. Color palette generator included.
DeveloperValidate, format, and pretty-print JSON instantly. Detect errors with exact line numbers, minify, expand, and copy formatted JSON. 100% client-side.
DeveloperConvert JSON to CSV or Excel-ready files with nested object flattening, delimiter choice and live preview. Free, no signup.
DeveloperPaste JSON and generate TypeScript interfaces automatically. Optional fields, readonly modifiers, and export styles included.
DeveloperDecode JWT tokens instantly in your browser. View header, payload claims and expiry dates. Your token never leaves your device. Free, no signup.
DeveloperPaste Markdown and get clean, semantic HTML instantly with live side-by-side preview, plus copy and download buttons. Free, no signup.
DeveloperPreview how your link looks on Facebook, X, LinkedIn, and Slack. Get copy-ready OG and Twitter Card meta tags. Free, no signup.
DeveloperCalculate PPI from resolution and screen size, plus megapixels, aspect ratio, and print sizes at 300, 150, and 72 DPI. Free, no signup.
DeveloperConvert px to rem and rem to px instantly. Set your base font size, see the em equivalent, and browse a live table of common pixel values. Free.
DeveloperTest, debug, and explain regular expressions in real time. Highlights matches, shows groups, supports all JS regex flags. Free online regex tool.
DeveloperFormat and beautify SQL queries for readability. Supports SELECT, INSERT, UPDATE, DELETE, CREATE TABLE and common SQL clauses. Free online SQL formatter.
DeveloperEnter an IP and CIDR to get the network address, broadcast address, subnet mask, wildcard mask, usable hosts, and IP range. Free, no signup.
DeveloperEncode special characters in URLs to percent-encoding, or decode %XX sequences back to text. Essential tool for building and debugging web URLs.
DeveloperCheck color contrast ratios against WCAG 2.1. Get AA/AAA pass-fail badges for normal and large text, plus one-click fixes.
DeveloperPaste a payload, enter your secret, and check whether the HMAC-SHA256 signature matches. Works like Stripe verification. 100% in-browser. Free.
DeveloperPretty-print, minify, and validate XML documents. Get precise error messages pointing at the exact line of malformed markup.
DeveloperConvert YAML to JSON and JSON to YAML bidirectionally, with inline validation errors for broken configs. Free, no signup.
DeveloperCalculate how much baseboard trim you need: enter wall lengths, pick 8, 12, or 16 ft pieces, add a waste factor, and get the buy list. Free, no signup.
DIY & HomeEstimate beam size and load capacity for simple span beams. Calculate maximum bending moment, shear force, and deflection for uniformly distributed loads.
DIY & HomeCalculate board feet for any lumber size: enter thickness, width, length, and quantity to get total board feet and the cost at your price per board foot.
DIY & HomeCalculate number of bricks, mortar bags, and sand needed for a brick wall project. Supports standard, modular, and queen size bricks.
DIY & HomeCalculate how many 60 or 80 lb bags of concrete mix you need for a slab, footing, or post hole. Includes waste, water estimate, and weight. Free.
DIY & HomeCalculate concrete volume for round or square footings. Find how many bags of concrete mix you need for deck footings, fence posts, and column foundations.
DIY & HomeCalculate concrete for a slab: enter length, width, and thickness to get cubic yards, cubic feet, and the number of 60lb or 80lb bags needed. Free.
DIY & HomeSpace deck balusters evenly so no gap exceeds 4 inches. Enter railing length and baluster width to get the baluster count and exact even spacing.
DIY & HomeCalculate how many gallons of stain or sealer you need for your deck, fence, or wood surface. Accounts for surface type, wood age, and number of coats.
DIY & HomeCalculate deck boards, joist hangers, fasteners, and material cost for your deck project. Supports 90° and 45° diagonal layouts with waste factor.
DIY & HomeCalculate drywall sheets needed for walls and ceilings, plus joint compound, drywall tape, and screws. Enter room dimensions for a complete materials list.
DIY & HomeEstimate joint compound, drywall tape, and screws. Enter square footage to get gallons, buckets, tape rolls, and screw count. Free, no signup.
DIY & HomeCalculate epoxy resin for river tables, coatings, and deep pours. Enter dimensions and mix ratio to get total gallons plus resin and hardener parts. Free.
DIY & HomeCalculate fence posts, pickets, rails, and concrete needed for your fence project. Works for wood, vinyl, and chain-link fencing.
DIY & HomeMeasure your firewood stack and convert it to full cords, face cords, and estimated heat output (BTU) for oak, maple, and pine. Free, no signup.
DIY & HomeCalculate square footage for hardwood, laminate, vinyl plank, or carpet. Get box count, cost estimate, and material with waste factor included. Free.
DIY & HomeCalculate how much garden soil, topsoil, or raised bed mix you need in cubic yards, cubic feet, or bags. Supports multiple raised beds and garden areas.
DIY & HomeFigure out how much grass seed and fertilizer your lawn needs. Covers tall fescue, bluegrass, and rye for new lawns and overseeding, plus N-P-K rates.
DIY & HomeCalculate gravel for driveways, paths, and landscaping. Enter length, width, and depth to get cubic yards, cubic feet, and tons by gravel type. Free.
DIY & HomeCalculate how much grout you need for tile installation. Enter tile size, joint width, and area to get bags of grout needed for any project.
DIY & HomeSize gutters and downspouts: enter roof area and rainfall intensity to get required capacity, gutter size, and downspout count. Free, no signup.
DIY & HomeFind how much insulation to add to your attic or floor. Enter area, current R-value, and climate zone for target R-value, bags, and depth. Free.
DIY & HomeCalculate joists, spacing, and materials for floor or deck framing. Supports 12, 16, and 24 inch on-center spacing with common joist sizes. Free.
DIY & HomeCalculate how much mulch you need in cubic yards or bags for garden beds, flower beds, and landscaping. Enter area and depth to get exact amounts.
DIY & HomeCalculate how many gallons of paint you need for walls, ceilings, or rooms. Enter room dimensions and get gallons needed with or without windows and doors.
DIY & HomeCalculate how many pavers you need for a patio, walkway, or driveway. Enter area and paver dimensions for total count, sand base, and cost estimate.
DIY & HomePlan a recessed can light layout for any room. Enter room size and ceiling height to get the number of lights, rows, columns, and exact spacing from walls.
DIY & HomeCalculate retaining wall blocks, cap stones, gravel base, and drainage pipe. Enter wall length and height, pick block size, get exact quantities. Free.
DIY & HomeCalculate roof pitch in X/12 format and angle in degrees. Enter rise and run to get pitch, rafter length per foot, and the shingle area multiplier. Free.
DIY & HomeCalculate roofing squares, number of shingles bundles, underlayment, and nails needed for a roof replacement or new construction. Includes pitch factor.
DIY & HomeCalculate the right air conditioner size for any room. Enter dimensions, sun exposure, and insulation to get required cooling in BTU and tons. Free.
DIY & HomeCalculate how much siding material you need for your home exterior. Supports vinyl, wood lap, fiber cement, and T1-11 siding with waste factor.
DIY & HomeCalculate how much sod you need for your lawn. Enter lawn dimensions and shape, add waste, and get the exact number of rolls and pallets to order. Free.
DIY & HomeCalculate stair stringer layout: steps, riser height, tread run, total run, stringer length, and stair angle. Flags IRC code violations. Free.
DIY & HomeCalculate how many tiles you need for a floor or wall. Enter room dimensions and tile size to get tile count, boxes, and square footage with waste. Free.
DIY & HomeCalculate how many boxes of vinyl plank flooring you need. Enter room size, plank dimensions, and waste factor to get box count and underlayment. Free.
DIY & HomeCalculate the number of wall studs needed for framing. Enter wall length and stud spacing to get stud count for 16" or 24" OC framing.
DIY & HomeFind exactly how many wallpaper rolls your room needs, accounting for pattern repeat and waste. Includes a safety roll. Free, no signup.
DIY & HomeFind the correct AWG wire size for a circuit. Enter amps, length, and voltage to meet ampacity and voltage drop limits (NEC). Planning use only. Free.
DIY & HomeEstimate your ACT composite (1-36) and SAT total (400-1600) from practice raw scores, with clear estimate framing and score band guidance. Free.
EducationEstimate your AP exam score from multiple choice and free response raw scores. See your composite and predicted 1 to 5 AP score with bands explained. Free.
EducationCheck if your child's backpack is too heavy. Enter the child's weight and loaded backpack weight for a safety verdict based on pediatric guidelines. Free.
EducationPaste English text and estimate its CEFR level from A1 to C2 using vocabulary and sentence complexity analysis. Great for teachers and learners. Free.
EducationCalculate your class attendance percentage and see exactly how many more classes you can miss before dropping below your school's minimum requirement.
EducationGenerate a random classroom seating chart in seconds. Paste your roster, set rows and columns, keep apart specific pairs, regenerate freely.
EducationTrack all your college application deadlines in one place. Add schools with EA, ED or RD dates, see live countdowns by urgency, and never miss one. Free.
EducationCompare the true cost of up to 3 colleges side by side. Enter tuition, housing, fees, books and aid to see net yearly cost and 4-year projections. Free.
EducationGenerate a printable Cornell notes page in seconds. Enter subject and topic, choose lined or blank layout and paper size, then print it. Free.
EducationCount words, characters, sentences and paragraphs in your essay, and get Flesch-Kincaid grade level, reading ease score and reading time as you type. Free.
EducationFind what score you need on your final to hit your target grade. Enter your current grade, the final's weight and your goal for the required score. Free.
EducationTurn your notes into interactive flashcards. Paste term:definition pairs, flip, shuffle, track progress. Free, no signup.
EducationGenerate perfect APA, MLA and Chicago citations for books, websites and journal articles. No signup, no limits, copy in one click.
EducationTest your typing speed with a 60-second typing test. Get your words per minute (WPM), accuracy, and live character highlighting. Free, no signup.
EducationGenerate printable math fact drills with addition, subtraction, multiplication, and division. Timed practice with scoring, printable worksheets, free.
EducationFocus with a 25-minute Pomodoro timer with short and long breaks, a session counter, and a persistent task list to plan your study blocks. Free, no signup.
EducationSplit a class or team into random groups instantly. Paste names, pick group count or size, shuffle fairly, and regenerate anytime. Free, no signup.
EducationPick a random student fairly with no repeats until everyone has been called. Paste your class roster, pick names one at a time, free.
EducationMeasure your reading speed in WPM with a timed passage plus a 3-question comprehension quiz to check you actually understood it. Free, no signup.
EducationEstimate reading time from pasted text or a word count. Adjust reading speed, and get speaking time too. Free, no signup.
EducationCalculate grades from rubric criteria with weights. Add criteria, enter points and scores, get the weighted total, percentage, and letter grade.
EducationBuild a day-by-day study plan for your exam with spaced repetition, subject weighting and daily hour targets you can actually follow. Free, no signup.
EducationCalculate weighted and unweighted GPA with AP, IB, and Honors bumps. Add courses, pick grades and levels, see both GPAs side by side.
EducationCalculate your current weighted grade from category weights and scores. See what you need on remaining work to reach your target grade. Free, no signup.
EducationModel a 10/1 ARM: the fixed-period payment, the first-adjustment shock, and the lifetime-cap worst case. Compare vs a 30-year fixed.
FinanceCalculate weekly pay for 12-hour shifts: regular hours, daily and weekly overtime, and shift differentials. Built for nurses, factory, and security schedules.
FinanceCompare buying a 3D printer against outsourcing prints: break-even volume, year-one savings, and the true per-print cost with filament, power, and upkeep.
FinanceCheck the 3x rent rule both ways: the income you need for a given rent, and the max rent your income supports. Includes gross vs net and roommate math.
FinanceProject your 401(k) balance with 2026 IRS limits, your employer match, and catch-up contributions. See what your paycheck deferrals become by retirement.
FinancePlan your monthly budget with the 50/30/20 rule. Enter take-home pay, adjust needs, wants and savings ratios, and get dollar targets per bucket. Free.
FinanceProject your 529 plan balance at college start, estimate future 4-year costs with education inflation, and see your funding gap or surplus. Free.
FinanceSplit your income with the 70/20/10 money rule: 70% living expenses, 20% savings and debt payoff, 10% giving. See monthly and yearly targets instantly.
FinanceCalculate average daily rate (ADR) from room revenue and rooms sold. Add occupancy to get RevPAR and benchmark your pricing performance.
FinanceCalculate AFFO for REITs from FFO minus recurring capex. Get the AFFO payout ratio, the dividend safety metric REIT investors trust.
FinanceForecast additional funds needed (AFN) to support sales growth: asset requirements, spontaneous liabilities, and retained earnings in one equation.
FinanceCalculate adjusted gross income from wages, business, and investment income minus above-the-line adjustments like HSA, IRA, and student loan interest.
FinanceEstimate 2026 alternative minimum tax from AMTI: exemption, phaseout, and the 26%/28% brackets. See if you owe AMT on top of regular tax.
FinanceCalculate average propensity to consume (APC) and save (APS) from consumption and disposable income. Keynesian consumption math in seconds.
FinanceFind the true annual percentage rate of a loan from its amount, payment, and fees. Compares note rate vs APR and solves APR from any payment schedule.
FinanceConvert any nominal rate and compounding frequency to APY. Compare savings accounts, CDs, and money markets on the yield you actually earn.
FinanceCalculate days sales outstanding (DSO) from receivables and credit sales. See how fast customers pay and how much cash is trapped in AR.
FinanceModel any adjustable-rate mortgage: initial payment, first adjustment, and lifetime worst case with caps. Compare 5/1, 7/1, and 10/1 structures.
FinanceEstimate after repair value from comps, apply the 70% rule for max offer price, and model flip profit with repair and holding costs.
FinanceCalculate employee absence percentage from lost days and scheduled workdays. Benchmark against industry rates and estimate the payroll cost of absence.
FinanceCalculate accounting profit from total revenue and explicit costs, with profit margin. See how it differs from economic profit and cash flow.
FinanceCompute the Sloan accrual ratio from net income, operating cash flow, and total assets. Spot earnings propped up by accruals before the market does.
FinanceCalculate actual cash value (ACV) for insurance claims: replacement cost minus depreciation. See why ACV payouts fall short of replacement cost.
FinanceFind the true after-tax cost of debt: pre-tax rate times one minus the tax rate. Compare loans, bonds, and muni-equivalent yields.
FinanceEstimate 2026 Alabama state income tax with the 2%, 4%, 5% brackets, standard deduction, and personal exemptions. Single, joint, and head of family.
FinanceCompute the Altman Z-score from five financial ratios. Classify bankruptcy risk into safe, grey, and distress zones for manufacturers and private firms.
FinanceGrow regular payments into a future lump sum, or find what monthly income a lump sum buys. Compares both directions of the annuity math in seconds.
FinanceTurn a lump sum into a monthly paycheck. Enter your balance, rate, and payout years to see your payment, total received, and interest earned over time.
FinanceProject how much an asset appreciates: home values, land, and investments at any annual growth rate. See nominal vs inflation-adjusted gains.
FinanceCalculate employee attrition rate from departures and average headcount. Benchmark turnover and estimate the cost of replacing staff.
FinanceEstimate Australian income tax for 2025-26 with resident brackets, the 2% Medicare levy, marginal rates, and after-tax income.
FinanceEstimate your car lease payment from capitalized cost, residual value, and money factor, with the money factor to APR conversion built in.
FinanceCalculate your car loan monthly payment, total interest and amount financed from price, down payment, trade-in, tax, term and APR. Compare terms. Free.
FinanceCalculate average fixed cost per unit and see how spreading fixed costs over more output lowers per-unit cost. Includes ATC and break-even.
FinanceCompare arithmetic vs geometric average returns from yearly performance. See why the geometric mean is the return you actually earned.
FinanceCalculate average variable cost from total variable cost and output quantity. See how AVC moves with scale and where it meets marginal cost.
FinanceCompare a balance transfer offer against keeping your card: transfer fee, 0% promo months, and the true savings after the promo ends.
FinanceCalculate the balloon payment on a partially amortized loan: the monthly payment, the lump sum due at term end, and the total interest cost.
FinanceReconcile your book balance to the bank statement: deposits in transit, outstanding checks, fees, and errors. Find the true adjusted balance.
FinanceConvert basis points to percent, decimal, and fractions. Price rate moves, fees, and spreads in bps like the pros do every day.
FinanceCalculate staffing bill rates from pay rates with markup, burden, and margin targets. Price contract labor profitably, every time.
FinanceCalculate billable hours needed for revenue targets, utilization rates, and effective hourly rates. For freelancers, agencies, and firms.
FinanceModel Bitcoin ETF investing with your own return assumption: lump sum plus monthly buys, expense-ratio drag, and the volatility reality check.
FinanceSee how biweekly mortgage payments cut years and interest: payment amount, payoff timeline, and total savings vs monthly payments.
FinancePrice European call and put options with Black-Scholes: d1, d2, Greeks (delta, gamma, theta, vega, rho) from spot, strike, time, rate, volatility.
FinanceCalculate the blended interest rate across multiple loans: weighted by balance. See your true average cost of debt in one number.
FinanceEstimate your boat loan monthly payment with down payment and marine loan terms up to 20 years. See total interest on new or used boats.
FinancePrice a bond from coupon, yield, face value, and maturity, or solve for yield to maturity from a market price. Includes current yield.
FinanceCalculate bond convexity and modified duration: see how a bond's price responds to rate moves, including the curvature duration misses.
FinanceConvert T-bill discount rates and money-market yields to bond-equivalent yield. Compare short-term investments on one scale.
FinanceCalculate website bounce rate from single-page sessions and total sessions. Benchmark by page type and find what is actually broken.
FinanceCalculate the Bradford Factor absence score: spells squared times total days. Flag disruptive absence patterns fairly and consistently.
FinanceFind your break-even point in units and sales dollars: fixed costs divided by contribution margin. Know exactly when profit starts.
FinanceBuild a monthly budget: enter income and expenses, see your surplus or deficit, savings rate, and spending breakdown instantly.
FinanceCompare building software in-house against buying a vendor tool. Totals development, maintenance, licenses, and implementation over your horizon.
FinanceBuild a simple business budget: enter revenue, cost of goods, and operating expenses to get gross profit, net profit, and margins.
FinanceEstimate your business loan monthly payment, total interest, and payoff schedule. Compare terms and see how an origination fee changes the true cost.
FinanceEstimate a small business value with earnings multiples and a simple DCF. Enter profit, growth, and risk to get a valuation range.
FinanceCalculate working capital and the current ratio from current assets and liabilities. Check short-term financial health in seconds.
FinanceCompute customer acquisition cost from sales and marketing spend. Compare CAC to lifetime value and get your LTV to CAC ratio.
FinanceCompute expected return with the Capital Asset Pricing Model. Enter risk-free rate, beta, and market return for the CAPM cost of equity.
FinanceCalculate your 2020 CARES Act Economic Impact Payment: $1,200 per adult plus $500 per child under 17, with the exact phaseout math the IRS used.
FinanceProject your CD balance at maturity from APY or APR, compare compounding frequencies, and see what an early withdrawal penalty really costs you.
FinanceCalculate customer lifetime value from revenue, margin, and churn. Compare CLTV to CAC and see the payback behind every customer.
FinanceCalculate cost of goods sold from inventory and purchases. Get gross profit and gross margin for any product business, fast.
FinanceCompute cost per acquisition for ad campaigns: spend divided by conversions, with lead-to-customer math and break-even CPA targets.
FinanceTranslate between CPC and CPM with click-through rate. See the equivalent CPM of any CPC bid and which pricing model wins.
FinanceCalculate CPM from campaign cost and impressions. Compare impression costs across channels and convert to effective CPC.
FinanceCalculate click-through rate from clicks and impressions. Benchmark against industry medians and convert to expected visitors and CPC.
FinanceEstimate your 2026 California state income tax with current brackets, standard deduction, and the 1% mental health surcharge over $1M.
FinanceCalculate California overtime pay with daily 1.5x after 8 hours, double time after 12, and seventh-day rules. 2026 rates included.
FinanceSee profit, loss, and breakeven for call and put options at any stock price. Per-share and per-contract results with payoff diagrams explained.
FinanceSolve any leg of the cap rate triangle: capitalization rate, net operating income, or property value. Includes Gordon growth adjustment.
FinanceCompute capital gains yield from purchase and sale prices. See the price return with and without dividends for any holding period.
FinanceModel private equity and VC fund economics: hurdle rate, catch-up provisions, and the GP's 20% carried interest split on profits.
FinanceModel a currency carry trade: interest rate differential, margin, and FX moves. See profit, yield, and the breakeven exchange rate shift.
FinanceEstimate yearly credit card cash back from your spending by category. Compare flat-rate vs tiered cards to find your best earner.
FinanceCompare a cash rebate at a higher rate vs a low promotional APR on a car loan. See monthly payments, total interest, and which deal costs less.
FinanceCompute the cash conversion cycle from inventory, receivables, and payables days. See how fast your business turns operations into cash.
FinanceMeasure debt coverage with operating cash flow divided by total debt. See if cash comfortably covers obligations or trouble is brewing.
FinanceCompute the cash ratio: cash and equivalents over current liabilities. The strictest test of whether a company can pay bills now.
FinanceModel a cash-out refinance: new loan amount, cash received, new monthly payment, LTV, closing costs, and break-even timing.
FinanceCompute cash-on-cash return for rental property: annual cash flow after mortgage divided by total cash invested, with closing costs included.
FinanceCompare cell phone plans by true monthly cost per line. Factor in lines, data, taxes, fees, and phone financing to find the cheapest plan.
FinanceEstimate your 2026 Child Tax Credit: $2,200 per child under 17, phaseouts, and the refundable Additional Child Tax Credit.
FinanceCalculate customer churn rate and retention rate from starting, ending, and new customer counts. Includes revenue churn option.
FinanceEstimate home closing costs before you buy: origination, appraisal, title insurance, transfer tax and escrow. See total costs and cash to close. Free.
FinanceCompute output from the Cobb-Douglas production function Y = A·L^α·K^β. Explore returns to scale and marginal products of labor and capital.
FinanceCompute the insurance combined ratio from loss ratio and expense ratio. See if underwriting is profitable and by how much.
FinancePrice a commercial lease: annual rent from rate per square foot, total obligation with escalations, and effective monthly cost.
FinanceCalculate graduated or flat sales commissions across custom tiers. Enter total sales, set tier thresholds and rates, and see the exact payout.
FinanceFind who should produce what: enter each producer's output to get opportunity costs and the comparative advantage for both goods.
FinanceSee how your savings grow with compound interest. Add monthly contributions, compare compounding frequencies, and learn the rule of 72. Free, no signup.
FinancePrice consulting engagements: day rate, billable days, expenses, and contingency into a professional project fee with margin analysis.
FinanceCalculate consumer surplus from willingness to pay, market price, and quantity. See the buyer value created beyond the price paid.
FinanceCompute contribution margin per unit and ratio from price and variable cost. Get break-even units and sales instantly, free.
FinanceModel total cost, marginal cost, and average costs from fixed and variable cost inputs. Find the output where average cost bottoms out.
FinanceEstimate cost of equity three ways: dividend discount model, CAPM, and bond yield plus risk premium. Compare the methods side by side.
FinanceSee how long minimum payments take to clear your card and the true total interest. Compare adding a fixed extra payment each month.
FinanceSee exactly how long your balance takes to pay off and how much interest minimum payments really cost you. Free, no signup.
FinancePrice bull put and bear call credit spreads: max profit, max loss, breakevens, and return on risk for defined-risk option trades.
FinanceCompute credit utilization from balances and limits across cards. See per-card and overall ratios and the paydown needed for 30% and 10%.
FinanceMeasure cross price elasticity of demand between two goods. Tell substitutes from complements with the sign and strength of the result.
FinanceConvert between major world currencies with rates you enter yourself. No live feed; editable starting estimates for common pairs included.
FinancePrice currency forwards with covered interest parity: forward rate, forward points, and premium or discount versus spot.
FinanceCalculate the current ratio and quick ratio from balance sheet items. Benchmark liquidity and see working capital instantly.
FinanceCompute Customer Effort Score from survey responses. Average score, distribution, and effort-level breakdown for support experience.
FinanceCalculate the debt to equity ratio from total liabilities and equity. The classic leverage gauge lenders and investors check first.
FinanceCalculate DARTs, the daily average revenue trades metric brokerages report. Enter total revenue trades and trading days for the number.
FinanceValue a company with a discounted cash flow model. Project free cash flow, set WACC and terminal growth, get enterprise and per-share value.
FinanceCalculate the debt service coverage ratio from net operating income and debt service. The number every commercial lender checks first.
FinanceCalculate days inventory outstanding from average inventory and COGS. See how long stock sits before it sells and what that ties up in cash.
FinanceCalculate days payable outstanding from average payables and COGS. See how long you take to pay suppliers and what it means for cash flow.
FinanceCalculate days sales outstanding from receivables and credit sales. Find how fast customers pay and how much cash is stuck in invoices.
FinanceCalculate deadweight loss from a tax or subsidy. Enter the per-unit tax and the quantity change to get the lost economic surplus triangle.
FinancePay off multiple debts with the avalanche method. Enter balances, APRs, and minimums to get your payoff order, debt-free date, and interest.
FinanceCompare paying multiple debts separately versus one consolidation loan. See weighted APR, total interest, payoff time, and real savings.
FinanceCompare debt snowball vs avalanche payoff plans side by side. See your debt-free date and exactly how much interest each saves. Free, no signup.
FinanceEnter any debt and a fixed monthly payment to see months to payoff, total interest, and the payoff date. Add an extra payment to compare.
FinancePay off debt with the snowball method. List balances, rates, and minimums to see your payoff order, quick wins, debt-free date, and interest.
FinanceCalculate the debt to asset ratio from total liabilities and total assets. See what share of assets is funded by debt in seconds.
FinanceCalculate the debt to capital ratio from total debt and equity. Measure long-term leverage and compare capital structures accurately.
FinanceCalculate front-end and back-end debt-to-income ratios from income, housing payment and debts. See verdicts against the 28/36 rule and 43% limit. Free.
FinanceCalculate the defensive interval ratio: how many days a company can run on liquid assets without new revenue. Key liquidity gauge.
FinanceCalculate the present value of a deferred annuity. Enter the payment, rate, payout years, and deferral period for what it costs today.
FinanceCalculate a loan with deferred first payment. See the accrued balance, new monthly payment, and the true cost of "no payments for months".
FinanceCalculate the degree of operating leverage from sales, variable and fixed costs. See how sales swings magnify into profit swings.
FinanceCalculate asset depreciation with straight-line, double declining balance, 150% declining balance, or MACRS methods. Year-by-year schedule included.
FinanceCalculate direct material price variance from actual vs standard price and quantity. See if purchasing beat or missed the standard cost.
FinanceCalculate a discount rate with CAPM from the risk-free rate, beta, and market return. Then discount any future sum to present value.
FinanceFind sale prices fast, including stacked discounts. See exactly what you save and reverse-calculate original prices. Free, no signup.
FinanceCalculate your discretionary income: take-home pay minus essential expenses. See what is truly available for saving, investing, and fun.
FinanceCalculate disposable income from gross pay minus all taxes. See your true after-tax income monthly and annually, the number every budget should run on.
FinanceValue a dividend stock with the Gordon growth model. Enter the dividend, growth rate, and required return for intrinsic value per share.
FinanceCalculate dividend income from shares owned and dividend per share. See annual income, yield, and per-payment amounts by frequency.
FinanceCalculate the dividend payout ratio from dividends paid and net income. Judge whether a dividend is safe, sustainable, or stretched.
FinanceCalculate dividend yield from annual dividend per share and share price. Compare income returns across stocks and spot yield traps before you buy.
FinanceCalculate successive discounts: two discounts in a row. See the final price, total savings, and the single equivalent discount rate.
FinancePlan your down payment savings: how long to reach 20% (or any target), how much to save monthly, and what your money earns while you wait.
FinanceBreak ROE into profit margin, asset turnover, and leverage with the DuPont formula. Find exactly what drives return on equity.
FinanceCalculate the effective annual rate from any nominal rate and compounding frequency. Compare loans and savings on equal footing.
FinanceCalculate EBIT from revenue, COGS, and operating expenses. The clean measure of operating profit every analyst starts with.
FinanceCalculate EBITDA from revenue, costs, and D and A. The standard proxy for operating cash earnings used in every deal multiple.
FinanceCalculate EBITDA margin from EBITDA and revenue. Benchmark operating profitability against industry peers and see what each revenue dollar earns.
FinanceCalculate the EV/EBITDA multiple and implied enterprise value. The quick valuation every dealmaker runs first. Compare pricing to target multiples.
FinanceCalculate earnings before tax from EBIT and interest. The pre-tax profit line every tax calculation starts from. See the interest burden clearly.
FinanceCalculate monthly payments for an SBA Economic Injury Disaster Loan. Enter amount, rate, and term for the payment and total interest.
FinanceProject ELSS mutual fund SIP growth with 3-year lock-in math. See maturity value, gains, and Section 80C tax savings on your Indian tax-saving investment.
FinanceCalculate the economic order quantity that minimizes total inventory cost. Balance ordering costs against holding costs and find how often to reorder stock.
FinanceProject your Employees Provident Fund balance with 8.25% interest, 12% employee plus 12% employer contributions. Plan retirement the Indian salaried way.
FinanceCalculate earnings per share from net income, preferred dividends, and shares outstanding. The headline number behind P/E ratios and every earnings season.
FinanceMeasure earnings-per-share growth between periods, plus the CAGR for multi-year runs. Separate genuine profit growth from buyback engineering in one view.
FinanceCalculate the enterprise value to sales multiple from EV and revenue. Value high-growth companies on revenue when earnings are negative or meaningless.
FinanceCalculate Economic Value Added from NOPAT, WACC, and invested capital. See if the business truly creates shareholder value.
FinanceCalculate early loan payoff with extra payments. See months saved, interest saved, and your new debt-free date for any loan.
FinanceCalculate earned value metrics: SPI, CPI, EAC, ETC, and VAC. The complete project cost and schedule health check in one place.
FinanceCalculate an earnest money deposit from the home price and percentage. See typical ranges and what happens to the deposit.
FinanceCalculate economic profit: revenue minus explicit and implicit costs. See true profit after counting all opportunity costs honestly.
FinanceCalculate the effective corporate tax rate from tax expense and pre-tax income. See the real tax burden, not the statutory rate.
FinanceCalculate effective duration from bond prices at higher and lower yields. Measure interest rate risk the professional way.
FinanceFind your emergency fund target for 3, 6 or 9 months of expenses and build a savings plan to reach it. See your monthly savings target. Free.
FinanceCalculate employee turnover rate from separations and headcount. Estimate the replacement cost of churn and see what it costs per year.
FinanceCalculate ending inventory from beginning stock, purchases, and cost of goods sold. The balance-sheet number every retailer and manufacturer must get right.
FinanceCalculate enterprise value from market cap, debt, and cash. The real price of buying a whole company, and the base for every serious valuation multiple.
FinanceConvert a nominal rate between compounding frequencies: monthly to quarterly, semi-annual to effective annual. Compare loans and deposits on equal footing.
FinanceEstimate federal estate tax with the 2026 $15 million exemption. Enter your gross estate, debts, and prior gifts to see if any tax is owed at 40%.
FinanceEstimate commercial property resale value from final-year NOI and exit cap rate. See how a half-point move in the exit rate changes your sale proceeds.
FinanceCalculate expected monetary value: weight each outcome by its probability. The decision-tree math behind bids, projects, and contingency reserves.
FinanceCalculate the probability-weighted expected return of an investment across scenarios. The portfolio math behind every asset allocation decision.
FinanceCompute expected utility with log utility and the certainty equivalent of a gamble. See why rational investors reject positive-EMV bets.
FinanceCalculate what a mutual fund or ETF expense ratio costs you per year and over a decade. See the quiet fee that compounds against you.
FinanceCalculate free cash flow to equity from FCFF, after-tax interest, and net borrowing. The dividend and buyback capacity gauge.
FinanceCalculate free cash flow to the firm from EBIT, tax, depreciation, CapEx, and working capital changes. The standard DCF starting point.
FinanceCalculate funds from operations for REITs: net income plus depreciation minus property sale gains. The earnings number that actually matters for real estate.
FinanceCalculate your FHA loan payment with 3.5% down, upfront MIP of 1.75%, and annual MIP of 0.55%. Checks 2026 loan limits and credit rules.
FinanceCalculate 2026 FICA taxes: 6.2% Social Security to $184,500, 1.45% Medicare, plus 0.9% over $200k/$250k. Employee share with employer match explained.
FinanceCalculate FIFO cost of goods sold and ending inventory layer by layer. See exactly which purchase batches your sales consumed, first in, first out.
FinanceCalculate your FIRE number with the 25x rule, estimate years to financial independence and your FI age, plus Coast FIRE and Barista FIRE numbers. Free.
FinanceCalculate full-time equivalent employees from part-time headcount and hours. Essential for ACA, staffing, and HR planning.
FinanceCompare federal repayment plans side by side: Standard, Graduated, Extended, and income-driven. See monthly payments and total cost for each.
FinanceFind your 2026 federal tax bracket, marginal rate, and estimated tax. Enter income and filing status for the full bracket breakdown and effective rate.
FinanceCalculate Fibonacci retracement levels (23.6%, 38.2%, 50%, 61.8%, 78.6%) from any swing high and low. Map support and resistance traders watch.
FinanceCalculate the finance charge on a balance from APR and days: the dollar cost of borrowing. Compare credit cards, loans, and payoff timing.
FinanceCalculate the financial leverage ratio (equity multiplier): total assets divided by equity. See how much of the balance sheet debt finances.
FinanceSplit any nominal interest rate into real return and inflation with the Fisher equation. See what your money truly earns after prices rise.
FinanceCalculate fixed asset turnover: revenue divided by average net fixed assets. See how hard your property, plant, and equipment work for sales.
FinanceCalculate Florida overtime pay at 1.5x your hourly rate for hours over 40. Federal FLSA rules, worked example, and pay stub checks.
FinanceCalculate Florida sales tax with the 6% state rate plus your county surtax (0 to 2%). Includes the $5,000 surtax cap rule.
FinanceCompute the fair forward exchange rate from spot and the two interest rates. Covered interest rate parity with day-count math.
FinanceCalculate the annualized forward premium or discount from spot and forward rates. See pips and the yearly percent instantly.
FinanceCalculate free cash flow from operating cash flow minus capital expenditures. See FCF margin, uses of cash, and warning signs.
FinanceCalculate free-float percentage from shares outstanding and restricted shares. See what is actually tradable in the market.
FinanceCreate professional invoices in seconds and print to PDF. Line items, tax, discounts. Your data stays in your browser. Free, no signup.
FinanceTurn your salary goal into a freelance rate that covers taxes, expenses and time off. Includes utilization slider. Free, no signup.
FinanceGrow money forward in time. Find the future value of a lump sum or of regular contributions with compound interest at any frequency.
FinanceCalculate futures P&L from entry, exit, multiplier, and contract count. See notional value, tick math, and return on notional.
FinanceCalculate GDP with the expenditure approach: consumption plus investment plus government spending plus net exports, with shares.
FinanceCompute the GDP deflator from nominal and real GDP. See the implied price level and convert between nominal and real output.
FinanceMeasure the output gap between actual and potential GDP. Negative gap signals slack; positive gap signals overheating risk.
FinanceCalculate GDP growth between two periods as a percent. Works for quarterly or annual figures, nominal or real, with absolute change.
FinanceDivide GDP by population to get GDP per capita. Compare living standards across countries or track one country over time.
FinanceCalculate GMROI from gross margin dollars and average inventory cost. See the return on every dollar tied up in stock, by category.
FinanceCalculate gross rating points from reach and frequency. Plan TV, radio, and ad campaign weight with the classic media metric.
FinanceCalculate India GST at 2026 slabs (5%, 18%, 40%) on any amount, exclusive or inclusive. Get the exact tax split and totals instantly.
FinanceCalculate the GS1 check digit for any GTIN-12/UPC barcode. Validate product codes before printing labels or listing products.
FinanceCalculate road trip fuel cost from distance, your MPG and the gas price. See gallons needed, total fuel cost and per-person cost when splitting. Free.
FinanceCalculate Georgia overtime pay at 1.5x your hourly rate for hours over 40. Federal FLSA rules apply statewide, with examples.
FinanceCalculate gift of equity for buying a family home: loan amount, gift percent, and whether it meets FHA down payment rules.
FinanceCompute the Gini coefficient from income quintile shares. 0 means perfect equality and 1 means maximum inequality, with reading guide.
FinanceCalculate gold melt value from weight, karat purity, and spot price. See pure gold content and what dealers pay below melt.
FinanceCalculate goodwill from an acquisition: purchase price minus the fair value of net identifiable assets, with impairment notes.
FinanceEstimate Google AdSense earnings from monthly pageviews and RPM. See monthly and annual revenue with realistic niche benchmarks.
FinanceCalculate the Graham number from EPS and book value per share. Get Benjamin Graham's classic ceiling for a stock's fair value.
FinanceCalculate gross rent multiplier from price and annual rent. Screen rental properties fast with the classic GRM rule and yield.
FinanceCalculate the present value of a growing annuity: payments that rise each period. Ideal for rising dividends and salaries.
FinanceCalculate your second stimulus check under the 2020 HEALS Act proposal: $1,200 per adult plus $500 per dependent of any age, with phaseout math.
FinanceCompare the HEALS Act $200/week proposal against the CARES $600 supplement. See weekly benefits and totals under each plan side by side.
FinanceCompare the 2020 HEALS and HEROES Act stimulus proposals side by side with the CARES Act you actually got. Enter income and dependents to see all three.
FinanceCalculate HELOC payments for the draw period and repayment period. See interest-only minimums, amortized payments, and what a rate increase does.
FinanceCalculate your stimulus under the 2020 HEROES Act: $1,200 per adult plus $1,200 per dependent up to 3. See what the House plan would have paid you.
FinanceCompute the Herfindahl-Hirschman Index from market shares. See DOJ concentration thresholds for mergers and competition.
FinanceCalculate HRA exemption under Section 10(13A): the least of actual HRA, rent minus 10% of salary, and 50% or 40% of salary.
FinanceCompute the minimum-variance hedge ratio from correlation and volatilities. Size futures hedges that actually offset spot risk.
FinanceSplit mixed costs into fixed and variable parts with the high-low method. Get the cost formula for budgeting and forecasting.
FinanceFind how much house you can afford on your income using the 28/36 rule lenders use. Includes taxes, insurance and HOA. Free, no signup.
FinanceCalculate your home equity loan payment and how much you can borrow. Fixed rate lump sum based on your home value, mortgage balance, and CLTV limit.
FinanceEstimate a US home's future value from purchase price and appreciation rate. Compound growth with plain-English results.
FinanceConvert hourly wage to annual salary, monthly, and biweekly pay. Adjust hours per week for part-time or irregular schedules.
FinanceConvert hourly pay to annual salary including overtime at time-and-a-half. See what regular weekly OT adds to yearly income.
FinanceCalculate gross pay from hours worked at any hourly rate, with overtime at time-and-a-half. Built for weekly timesheets.
FinanceUse the 20/4/10 rule to find a car budget that fits your income. Includes loan payment, insurance and fuel costs. Free, no signup.
FinanceCompare Traditional and Roth IRA growth side by side with 2026 IRS limits. See which account leaves you with more spendable money in retirement.
FinanceFind the internal rate of return for any series of cash flows. Uses Newton-Raphson with a bisection fallback, and tells you plainly when no IRR exists.
FinanceEstimate Illinois income tax at the 4.95% flat rate with the $2,925 personal exemption. Retirement income exclusion included.
FinanceCalculate Illinois overtime pay at 1.5x your hourly rate for hours over 40. State and federal rules explained with a worked example.
FinanceCalculate impermanent loss for AMM liquidity pools from the price change ratio. See exactly what LPs lose versus simply holding tokens.
FinanceCalculate income elasticity of demand from quantity and income changes. Classify goods as luxury, necessity, or inferior.
FinanceEstimate your 2026 federal income tax with the official IRS brackets for single and married filing jointly. Includes the standard deduction and marginal rates.
FinanceAdjust any dollar amount for inflation using real CPI data from 1990 to 2025. See what past money is worth today, or what today's money buys later. Free.
FinanceCalculate the information ratio from active return and tracking error. Judge whether a manager's outperformance was consistent.
FinanceCalculate the interest coverage ratio from EBIT and interest expense. See whether earnings comfortably cover debt payments, with health bands.
FinanceFind daily interest on any principal at any annual rate. Switch between 365 and 360 day-count bases with monthly totals.
FinanceFind the interest rate behind any investment. Enter a starting amount, an ending amount, and the number of years to solve for the exact annual rate.
FinanceTest covered interest rate parity: compute the fair forward from rates and spot, then compare any market quote for arbitrage.
FinanceCalculate interest-only mortgage payments and see the balance after the IO period. Understand the principal that never shrinks.
FinanceEstimate a stock's intrinsic value with a single-stage DCF using free cash flow per share, growth rate, and discount rate. Includes sensitivity notes.
FinanceCalculate inventory turnover from COGS and average inventory. See turns per year and days of stock on hand, with industry context.
FinanceSee what investment fees really cost: compare growth with and without the fee over decades. The 1% fee eye-opener, quantified.
FinanceCalculate Jensen's alpha from portfolio return, beta, and market return. See whether the manager truly beat CAPM expectations after risk.
FinanceCalculate jumbo loan payments and check the 2026 conforming limit of $832,750. See exactly when your loan goes jumbo, with total interest.
FinanceCalculate the Liquidity Coverage Ratio from HQLA and 30-day net cash outflows. See the 100% Basel III minimum and what counts as liquid assets.
FinanceCalculate loss given default (LGD) from exposure and recovery. Add default probability to get expected loss, the core of credit risk modeling.
FinanceCalculate LIFO cost of goods sold and ending inventory from purchase layers. Enter quantities and unit costs, get COGS, ending value, and gross profit.
FinanceCalculate loan-to-value ratio from loan amount and property value. See your equity, the 80% PMI threshold, and what LTV means for approval.
FinanceCalculate the true cost per employee with a burden rate covering payroll taxes, benefits, and insurance on top of wages.
FinanceCalculate the labor force participation rate from BLS-style data. Enter labor force and population, get the rate plus the employment-population ratio.
FinanceMeasure labor productivity as output per hour worked. Enter units, hours, and labor cost for units per hour, cost per unit, and output per labor dollar.
FinanceEstimate monthly payments on a land loan. Enter the price, down payment, rate, and term to see the payment, total interest, and why land loans cost more.
FinanceEstimate your equipment or vehicle lease payment from capitalized cost, residual value, term, and rate. See the money factor math.
FinanceCalculate lease mileage overage charges before lease end. Enter your allowance, expected miles, and per-mile fee to see the excess mileage bill.
FinanceCompare the true cost of leasing vs buying over your ownership period: loan payments, lease fees, residual value, and the equity you keep if you buy. Free.
FinanceCalculate lemonade stand profit from cups sold, price, and cost per cup. See revenue, margin, and how many cups it takes to break even.
FinanceCalculate the Lerner Index from price and marginal cost. See what the 0 to 1 scale says about monopoly power and markup behavior.
FinanceCalculate levered free cash flow from operating cash flow, capex, interest, and debt repayments. See the formula and how it differs from unlevered FCF.
FinanceEstimate your lifetime earnings from starting salary, annual raises, and career length. See your final salary and total earned over a full career.
FinanceCalculate liquid net worth from cash, savings, and investments minus debts. See the wealth you can actually access without selling property.
FinanceCalculate your monthly loan payment, total interest, and payoff date, then inspect the full month-by-month amortization schedule. Free, no signup.
FinanceCalculate the monthly payment, total interest, and full amortization for any loan. Compare terms and see how extra payments cut costs.
FinanceCompare two loans side by side. Enter amount, rate, and term for each to see payments, total interest, and which loan costs less overall.
FinanceFind how many months or years it takes to repay a loan at a payment you can afford. Enter balance, rate, and EMI to get the exact payoff timeline.
FinanceProject future long-term care costs with health-care inflation. Enter current costs and years until needed to see the future annual and total bill.
FinanceCalculate the insurance loss ratio from incurred losses and earned premiums. See the formula, healthy benchmarks, and how it feeds the combined ratio.
FinanceCalculate lost wages from missed work. Enter your pay rate, hours, and days missed to document income loss for claims and planning.
FinanceEstimate the cash value of a lottery annuity. Enter the jackpot, payment years, and discount rate to see the lump sum equivalent.
FinanceEstimate taxes on lottery winnings. Enter the prize and your state rate to see federal tax, state tax, and what you actually keep.
FinanceCompare a lump sum investment against monthly SIP contributions at the same return. See which grows more and the crossover point.
FinanceCalculate your Modified Adjusted Gross Income (MAGI). Enter AGI plus add-backs like student loan interest to see the figure behind key tax limits.
FinanceCalculate marginal propensity to consume (MPC) and save (MPS) from income and spending changes. See the Keynesian multiplier too.
FinanceCalculate Market Value Added: market value minus invested capital. See how much wealth management created (or destroyed) for shareholders.
FinanceCalculate total man-hours for a project from workers, hours per day, and days. Get man-days, crew cost, and schedule estimates instantly.
FinanceConvert between profit margin and markup, or solve for price, cost, margin, or markup from any two known values. Instant, accurate.
FinanceCalculate the stock price that triggers a margin call. Enter purchase price, initial and maintenance margins to see your danger zone.
FinanceCompare profit margins for two products, periods, or price sets. Enter cost and price for each to see margin, markup, and which earns more.
FinanceCalculate margin loan interest from your brokerage. Enter the balance, APR, and days to see the interest cost of investing on margin.
FinanceCalculate selling price from cost, profit margin, and sales tax. See the pre-tax price, tax amount, and checkout total in one calculation.
FinanceCalculate selling price from cost, profit margin, and VAT. See the ex-VAT price, VAT amount, and final inclusive price in one pass.
FinanceCalculate margin of safety from intrinsic value and price. See the discount percentage and what it means for value investing decisions.
FinanceCalculate marginal cost from two production levels. Enter quantities and total costs to find the cost of each additional unit.
FinanceCalculate marginal revenue from two sales levels. Enter quantities and total revenue to find what each additional unit brings in.
FinanceCalculate market capitalization from share price and shares outstanding. See the total value and whether the stock is large, mid, or small cap.
FinanceCalculate marketing conversion rate from visitors and conversions. See cost per acquisition and revenue per visitor for any campaign.
FinanceCompare your combined tax married filing jointly against two single returns. See whether marriage gives you a tax bonus or costs you a penalty.
FinanceCalculate maximum drawdown from a series of portfolio values. Paste values to find the worst peak-to-trough decline and recovery math.
FinanceCompare Mega Millions annuity and cash options after tax. Enter the jackpot to see the cash value, taxes, and net payout each way.
FinanceCalculate mileage reimbursement with the IRS standard rate. Enter business miles to see the deductible amount or employer reimbursement.
FinanceFind out how long it takes to become a millionaire. Enter current savings, monthly contributions, and return to see your timeline to $1 million.
FinanceCalculate Missouri sales tax with the 4.225% state rate plus your local rate. See the tax amount and total for any purchase.
FinanceCalculate Modified Internal Rate of Return from cash flows. Enter the series plus finance and reinvestment rates for the realistic MIRR.
FinanceCount cash fast with the money counter. Enter quantities of each bill and coin to get the exact total for registers and deposits.
FinanceConvert a car lease money factor to APR and back. Enter the money factor to see the equivalent interest rate and judge whether the lease deal is fair.
FinanceCalculate the money multiplier from the reserve requirement. See how each dollar of reserves can expand the money supply in theory.
FinanceCalculate M1 and M2 money supply from components. Enter currency, deposits, and savings to see the monetary aggregates the Fed tracks.
FinanceCalculate the month-over-month growth rate from two monthly values. See the MoM change and the annualized equivalent rate instantly.
FinanceCalculate the cost of a loan moratorium. Enter balance, rate, and holiday months to see accrued interest and the higher balance after.
FinanceCalculate your monthly mortgage payment with principal, interest, taxes, insurance and PMI. See how extra payments cut interest and when PMI drops off.
FinanceEnter your balance, rate, and extra payments to see your mortgage payoff date, total interest saved, and a full amortization schedule. Free.
FinanceDecide if discount points are worth it. Compare monthly payments, find your break-even month, and see total savings over your expected stay. Free.
FinanceCalculate your mortgage prepayment penalty. Enter your balance, rate, and penalty terms to see the payoff cost before you refinance or sell.
FinanceCalculate simple and exponential moving averages from price data. Paste values, pick a period, and see the trend lines traders watch.
FinanceEstimate mutual fund growth from a lump sum plus monthly SIP contributions. See exactly how the expense ratio eats into your returns year after year.
FinanceCalculate a mutual fund's NAV per share from total assets, liabilities, and shares outstanding. Understand what one fund share really holds.
FinanceCalculate net operating income from rental revenue, vacancy, and operating expenses. The core number behind cap rates and commercial property values.
FinanceCalculate NOPAT from EBIT and the tax rate. The after-tax operating profit behind EVA, RNOA, and unlevered valuation models.
FinanceEstimate your National Pension System corpus in India: monthly contributions, expected returns, and the power of 20+ years of compounding.
FinanceCalculate net present value from an initial investment, yearly cash flows, and a discount rate. The gold standard for go or no-go decisions.
FinanceCalculate the Net Stable Funding Ratio (available vs required stable funding). The Basel III liquidity metric banks must keep above 100%.
FinanceCalculate the natural rate of unemployment from frictional plus structural unemployment. Understand full employment and the NAIRU.
FinanceCalculate net debt from total debt minus cash and equivalents, plus the net debt to EBITDA ratio lenders watch. Free, instant, with a worked example.
FinanceCalculate net effective rent: total lease payments minus concessions, spread over the term. Compare apartments with free months honestly.
FinanceCalculate net income from revenue through COGS, operating expenses, interest, and taxes. See gross profit, operating income, and net margin step by step.
FinanceCalculate net operating assets from operating assets minus operating liabilities. The balance-sheet base behind return on net operating assets (RNOA).
FinanceCalculate net operating working capital from operating current assets minus operating current liabilities. Spot cash trapped in receivables and inventory.
FinanceCalculate net profit margin from net income and revenue. The final profitability ratio every investor checks, with benchmarks by industry.
FinanceCalculate Net Promoter Score from survey responses: promoters, passives, detractors, and what your score actually means.
FinanceAdd up everything you own, subtract everything you owe, and get your net worth in seconds, with a breakdown of where your wealth sits. Free.
FinanceWork backwards from take-home pay to the gross salary you need. Gross-up calculator with tax rate, for salary negotiations and offers.
FinanceCalculate New Jersey sales tax at the 6.625% state rate, including the 3.3125% Urban Enterprise Zone rate. Add or strip tax from any price.
FinanceCompare your federal tax under the One Big Beautiful Bill Act vs old law. Includes the new tips, overtime, and senior deductions with phaseouts.
FinanceCalculate New York overtime pay under 2026 rules: 1.5x over 40 hours, plus the 2026 exempt salary thresholds ($66,300 NYC, $62,353 rest of state).
FinanceEstimate 2026 New York state income tax with the current brackets (3.9% to 10.9%). Single, joint, and head of household, with standard deduction.
FinanceCalculate occupancy rate and vacancy rate for rental property. The utilization metric behind rental income forecasts and valuations.
FinanceCalculate Ohio sales tax with the 5.75% state rate plus your county add-on. Add or remove tax and see the layered total instantly.
FinanceApply Okun's law: estimate the GDP gap from the unemployment gap. See what each point of unemployment costs in lost output.
FinanceCalculate marketing ROI and ROAS from ad spend, revenue, and costs. Know exactly what each campaign returns before scaling it.
FinanceCalculate operating asset turnover: revenue divided by average operating assets. See how hard each dollar of operating capital works.
FinanceCalculate operating cash flow from net income with depreciation, amortization, and working capital changes. See where profit turns into cash.
FinanceCalculate the operating cash flow ratio (OCF divided by current liabilities). Test whether operations generate enough cash to cover short-term bills.
FinanceCalculate operating margin from operating income and revenue. Judge the core business before interest and taxes distort the picture.
FinanceCalculate opportunity cost by comparing two options side by side. See exactly what the road not taken is really worth in dollars.
FinanceCalculate the minimum-variance hedge ratio from correlation and volatilities. Size your futures hedge to actually offset the risk.
FinanceFind the profit-maximizing price from marginal cost and demand elasticity using the inverse-elasticity markup rule economists use.
FinanceCalculate max profit, max loss, and breakeven for a bull call spread. See the full payoff diagram before you place the trade.
FinanceCalculate overtime pay at time-and-a-half or double time from regular hours, overtime hours, and hourly rate, with weekly FLSA totals.
FinanceCalculate a full paycheck with overtime hours: gross pay at time-and-a-half, then estimated take-home after tax withholding.
FinanceCalculate the price-to-book ratio from share price and book value per share. The classic value-investor multiple for asset-heavy businesses.
FinanceCalculate the price-to-earnings ratio from share price and EPS. The most quoted valuation multiple, with trailing vs forward explained.
FinanceCalculate the price-to-sales ratio from market cap and revenue. The go-to multiple for young or unprofitable growth companies.
FinanceCalculate the PEG ratio from P/E and earnings growth. Lynch's classic test of whether a stock's price is justified by its growth.
FinanceCalculate your full PITI mortgage payment: principal, interest, property tax, and homeowners insurance. The real monthly housing cost.
FinanceCalculate monthly PMI from your loan amount and PMI rate. See what mortgage insurance costs each month and when it drops off at 80% LTV.
FinanceFind when your PMI drops off. Enter home price, loan details and appreciation to see when you hit 80% LTV and what early cancellation saves you. Free.
FinanceProject your PPF balance at 7.1% with yearly contributions up to ₹1.5L. Tax-free growth over 15 years, node-verified math.
FinanceCompare price levels across countries with purchasing power parity. Convert currencies by what money actually buys, not market rates.
FinanceEstimate Paycheck Protection Program loan forgiveness: payroll costs, FTE levels, and the 60% payroll rule. Historical reference; the program ended in 2021.
FinanceSplit a stock price into assets in place and growth value. Enter price, EPS, and required return to find PVGO and what share of the price is growth.
FinanceLook up the present value interest factor of an annuity instantly. Enter the rate and periods to get PVIFA, then apply it to any payment stream.
FinanceCalculate Pag-IBIG housing loan monthly amortization with 2026 repricing rates (5.75% to 9.75%), plus the 35% income requirement.
FinanceCalculate Pakistan salaried income tax for FY 2025-26 (Finance Act 2025 slabs). Monthly and annual tax with surcharge check.
FinanceCalculate a property's parking ratio: spaces per 1,000 square feet of rentable area. The CRE metric lenders and tenants check.
FinanceCalculate payments and the balloon balance on a partially amortized loan. See the monthly payment and the lump sum due at the end.
FinanceCalculate PayPal fees with 2026 US rates: Checkout 3.49% + $0.49, cards 2.99% + $0.49, QR 2.29% + $0.09. Net received or gross-up pricing.
FinanceFind how long it takes an investment to pay for itself. Compares the simple payback period with the discounted payback period at your cost of capital.
FinanceEstimate take-home pay per paycheck from gross pay, pay frequency, filing status and deductions. See tax, Social Security, Medicare and net pay. Free.
FinanceCalculate what a payday loan really costs: fees, total repayment, and the shocking APR. See the true price before you borrow.
FinanceSolve for your periodic loan payment with monthly, biweekly, or weekly schedules. Compare frequencies and add extra payments to finish early.
FinanceConvert pence to pounds and pounds to pence instantly. Simple UK currency subunit math for prices, change, and accounting.
FinanceEstimate your defined benefit pension from years of service, your salary multiplier, and final average salary. See your monthly check and replacement ratio.
FinanceCalculate the present value of a perpetuity, flat or growing. The formula behind terminal value, preferred stock, and endowment math.
FinanceCalculate your personal loan monthly payment, total interest, and payoff cost. Compare how the rate, term, and origination fee change what you pay.
FinanceEstimate Philippines income tax under TRAIN law brackets. Graduated rates from 0% to 35% with per-bracket breakdown and take-home pay.
FinanceCalculate inflation from the expectations-augmented Phillips curve: expected inflation minus slack times sensitivity. See the unemployment-inflation trade-off.
FinanceCalculate classic pivot points, support and resistance levels from the prior high, low, and close. The floor-trader levels still on every chart.
FinanceCalculate your portfolio's beta from each holding's weight and beta. See whether your portfolio moves with, above, or below the market.
FinanceCalculate POMIS monthly payouts at 7.4%: deposit up to ₹9L single or ₹15L joint, and see exactly what lands in your account each month.
FinanceCalculate post-judgment interest on a court award: federal rate or state rate, simple accrual from judgment date to payment.
FinancePowerball jackpot odds (1 in 292.2M), prize tiers, and expected value per ticket. The math behind the dream, honestly computed.
FinanceCalculate post-money valuation from pre-money and investment, plus price per share and founder dilution. Startup fundraising math, demystified.
FinanceDiscount future money to today's dollars. Calculate the present value of a lump sum or of an annuity stream with any compounding frequency.
FinanceCalculate price elasticity of demand with the midpoint formula. See whether your product's demand is elastic or inelastic.
FinanceCalculate price elasticity of supply with the midpoint formula. See how strongly producers respond to price changes over time.
FinanceCalculate price per share from market cap and shares outstanding, or reverse it. The basic share-count math behind every valuation.
FinanceCalculate price per square foot for any home: sale price divided by living-area square footage, with local comparison guidance.
FinanceCalculate total cost from unit price times quantity, with optional bulk discount tiers. Quick math for orders, invoices, and quotes.
FinanceCalculate the price-to-cash-flow ratio from share price and cash flow per share. A tougher valuation multiple than P/E, harder to manipulate.
FinanceCompute the profitability index of a capital project. Enter investment, cash flow, years, and discount rate for PI, NPV, and an accept-or-reject verdict.
FinanceCalculate fair prorated rent for mid-month move-in or move-out. Enter rent and the date for the daily rate and exact amount owed.
FinanceCalculate prorated salary for mid-period starts, exits, or unpaid leave. Enter annual salary and days worked to get the exact gross pay for the partial period.
FinanceTest put-call parity on any option pair. Enter stock price, strike, call and put prices, rate, and time to spot mispricing and arbitrage signals instantly.
FinanceCalculate Quebec sales tax: 5% GST plus 9.975% QST on the GST-included price. See each tax, the total, and the true combined rate.
FinanceTest short-term liquidity with the quick ratio. Enter current assets, inventory, and current liabilities to get the acid-test ratio and a plain-English verdict.
FinanceMeasure R&D intensity as research spending over revenue. Enter R&D expense and total revenue to get the ratio, per-employee spend, and an industry read.
FinanceCalculate your required minimum distribution with the official IRS Uniform Lifetime Table. Enter your age and prior year-end balance for your 2026 RMD.
FinanceCalculate return on assets from net income and average assets. See how efficiently assets generate profit, with DuPont context and benchmarks.
FinanceCalculate return on ad spend from campaign cost and revenue. Get ROAS, break-even ROAS from your margin, and the true profit behind the ratio.
FinanceMeasure operating efficiency with ROCE. Enter EBIT, total assets, and current liabilities to get return on capital employed and the interpretation.
FinanceCalculate return on equity from net income and average equity. Get ROE with the full DuPont breakdown: margin, turnover, and debt impact.
FinanceMeasure return on investment for any project, stock, or business. See total ROI, net profit, and the annualized return that lets you compare investments fairly.
FinanceCalculate return on invested capital from EBIT, tax, debt, and equity. Compare ROIC against your cost of capital to see if growth creates value.
FinanceCompute the Relative Strength Index from average gains and losses. Enter 14-period averages to get RSI, overbought/oversold signals, and the verdict.
FinancePrice any RV loan with long-term math. Enter price, down payment, rate, and term up to 20 years to get the monthly payment and total interest.
FinanceCalculate real estate commission from any sale price. Enter the price, commission rate, and agent split to see total fees and exactly who gets paid what.
FinanceCalculate the true cost of real estate commission: splits, broker fees, and what the agent actually keeps. See your net proceeds as a home seller.
FinanceAdd VAT to real estate commission correctly. Enter the sale price, commission rate, and VAT rate to get net commission, VAT due, and the gross total.
FinanceConvert nominal GDP to real GDP with the GDP deflator. Enter nominal GDP and the deflator to get real GDP, plus the growth rate versus a prior period.
FinanceFind your true inflation-adjusted return. Enter the nominal return and inflation rate to get the real rate of return with the exact Fisher equation.
FinanceMeasure how fast customers pay with receivables turnover. Enter credit sales and receivables to get the turnover ratio and days sales outstanding.
FinanceFind how many months until refinancing pays for itself. Compare your current loan to the new rate with closing costs included. Free, no signup.
FinanceCompare the true annual cost of remote versus on-location workers. Enter salary, office costs, and stipends to see per-worker and team-wide savings.
FinanceFind your affordable rent budget from your income using the 30% rule. Check a target rent against your pay and see what landlords require. Free.
FinanceSee what a rent increase really costs. Enter your current rent and the increase percent to get the new rent, monthly hike, and extra yearly cost.
FinanceSplit rent fairly between roommates by income share. Enter total rent and each person’s income to get proportional shares plus the equal-split comparison.
FinanceCompare renting vs buying year by year with an honest wealth comparison, not just monthly payments. See your break-even year. Free, no signup.
FinanceCalculate rental commission for tenant placement. Enter monthly rent and the commission rate to see the leasing fee, who pays it, and the annualized cost.
FinanceAnalyze a rental property: cap rate, cash-on-cash return, monthly cash flow, and the 1% rule. Full expense modeling with vacancy and management.
FinanceCalculate required bank reserves from the reserve ratio. Enter total deposits and the ratio to get required reserves, excess reserves, and lending capacity.
FinanceFind your monthly residual income after bills and debts. Enter income, expenses, and debt payments to get what is left, your savings rate, and a verdict.
FinanceCompute ending retained earnings fast. Enter beginning balance, net income, and dividends to get ending retained earnings and the retention breakdown.
FinanceFind the retention (plowback) ratio from net income and dividends. See what share of profit is reinvested, the payout ratio, and the implied growth rate.
FinanceProject your retirement savings with monthly contributions, employer 401(k) match, and compound growth. See if you are on track to retire comfortably.
FinanceTest how long retirement savings last with yearly withdrawals. Enter savings, withdrawal, return, and inflation to get years funded and the 4% check.
FinanceCalculate return on sales (net profit margin) from net income and revenue. See profit per sales dollar with margin benchmarks by industry.
FinanceCalculate total and net revenue instantly. Enter units sold, price per unit, and refunds to get gross revenue, net revenue, and average order value.
FinanceMeasure revenue growth between periods and the compound annual rate. Enter prior and current revenue plus years to get growth percent and CAGR.
FinanceBenchmark workforce efficiency with revenue per employee. Enter annual revenue and headcount to get RPE, compare bands, and spot productivity gaps.
FinanceCompare Roth vs Traditional 401(k) contributions: taxes now vs taxes later, lifetime after-tax value. Free, estimates only.
FinanceUse the rule of 72 both ways: years to double your money at any rate, or the rate needed to double in any timeframe. Instant answers, both directions.
FinanceProject Systematic Investment Plan returns the Indian way. Enter monthly SIP, years, and expected return to get maturity value, invested, and gains in rupees.
FinanceProject your Sukanya Samriddhi Yojana maturity at 8.2% p.a. Enter yearly deposits to see the corpus at 21 years, interest earned, and tax-free status.
FinanceModel a systematic withdrawal plan: monthly withdrawals from your corpus at an expected return. See how long the money lasts and total withdrawn.
FinanceCalculate SaaS customer lifetime value from ARPA, margin, and churn. Get LTV, the LTV to CAC ratio, and payback guidance for subscription growth.
FinanceTrack core SaaS metrics in one place. Enter customers, ARPA, churn, and expansion to get MRR, ARR, net revenue retention, and growth signals.
FinancePlan and fund a sabbatical or career break. Enter monthly costs, months off, and time to save to get your target fund and required monthly savings.
FinanceCalculate safety stock from service level, demand variability, and lead time. Enter your targets to get the buffer that prevents stockouts.
FinanceSee what your raise really means: new salary, raise amount, hourly equivalent, monthly take-home change, and the inflation-adjusted real raise.
FinanceConvert annual salary to hourly wage (and back). Adjust for hours per week and weeks per year, and see weekly, biweekly, and monthly pay. Free, no signup.
FinanceSee what inflation did to your salary. Enter pay, inflation rate, and years to get purchasing power today and the raise needed to keep up.
FinanceCalculate gross pay with overtime at time-and-a-half. Enter hourly rate, regular hours, and overtime hours to get regular, OT, and total pay.
FinanceAdd sales tax to a price or extract it from a total. Pick your state's base rate, add local tax, and see the full itemized breakdown.
FinanceProject savings growth with monthly deposits and compound interest. Set a goal to see if you are on track and what deposit gets you there.
FinanceCompare savings account rates the right way. Enter the nominal rate and compounding frequency to get true APY and first-year earnings on your deposit.
FinanceSee how long savings survive monthly withdrawals. Enter balance, withdrawal, and APY to get years funded, total withdrawn, and the sustainable amount.
FinancePrice scrap gold by weight, karat, and live spot. Enter grams or pennyweights, karat, and spot price to get melt value and typical payout.
FinancePrice scrap silver by weight, purity, and spot. Enter grams or ounces, fineness, and spot price to get melt value and expected buyer payout.
FinanceMeasure sell-through rate for any product or period. Enter units received and units sold to get the percentage, remaining stock, and weeks of cover.
FinanceValue your unused vacation days before selling them back. Enter salary and days to get the payout, daily rate, and whether selling beats taking time off.
FinanceCalculate the Sharpe ratio for any portfolio. Enter return, risk-free rate, and volatility to get risk-adjusted performance and the interpretation.
FinanceCalculate simple interest and the total amount with I = P x r x t for years, months, or days. Ideal for short-term loans and interest-only notes.
FinanceBuild a sinking fund for a known future expense. Enter the target cost, years, and return to get the required periodic payment and full schedule.
FinanceSee what smoking really costs at your pack price: yearly and lifetime spend, plus what that money would grow to if invested instead. Free, no signup.
FinanceEstimate your monthly Social Security benefit at ages 62, 67, and 70 using the official PIA bend-point formula, and compare lifetime value.
FinanceCalculate total contract value from monthly fees, term length, setup costs and discounts. See the effective monthly cost and compare vendor quotes fairly.
FinanceCalculate the Sortino ratio from a return series and a target return. Measures return per unit of downside risk, the sharper version of the Sharpe ratio.
FinanceCalculate the Keynesian spending multiplier from the marginal propensity to consume. See how government spending ripples through GDP, with examples.
FinanceTrack agile sprint progress: enter total story points and daily completions to see ideal vs actual burndown and your projected finish date.
FinanceEnter cash on hand and monthly net burn to get your runway in months, plus the burn multiple and the cuts needed to extend it.
FinanceEstimate your total state and local tax burden by state from income, property, and sales taxes. Compare all 50 states side by side before you move.
FinanceWhat if the second 2020 stimulus check had been capped at $40,000 income as floated that July? Compare the proposal against the CARES Act you got.
FinanceCalculate your new average share price after buying more at a lower price. See total cost basis, breakeven price, and shares needed to average down.
FinanceCalculate stock beta from covariance and market variance, or from return series. See what beta means for expected returns via CAPM.
FinanceCalculate your stock profit, total return percentage, and annualized return from buy price, sell price, shares, dividends, and holding period.
FinanceCalculate what happens in a stock split: new share count, adjusted price per share, and why your total investment value stays exactly the same.
FinanceCalculate your student loan monthly payment, total interest, and payoff date from balance, rate, and term. Compare what extra payments save you.
FinanceEstimate loan forgiveness under PSLF (120 payments) or income-driven repayment (20-25 years). See forgiven balance, total paid, and tax implications.
FinanceCompare avalanche vs snowball payoff across up to 3 student loans. See payoff order, total interest, extra-payment savings and debt-free date. Free.
FinanceAdd up every subscription and see the yearly waste from services you barely use. Includes the 10-year opportunity cost of forgotten recurring charges.
FinanceCalculate a company's sustainable growth rate from ROE and dividend payout. See how fast it can grow without new debt or equity financing.
FinanceCalculate TDS on FD and savings interest under Section 194A for FY 2025-26. Check thresholds for banks, senior citizens, and the 10% rate with PAN.
FinanceCalculate OSHA Total Recordable Incident Rate from incident count and hours worked. Benchmark your safety performance against industry rates.
FinanceCalculate trailing twelve month revenue, net income, EPS, and P/E from four quarters of data. The standard way to read a company's latest year.
FinanceConvert a tax-exempt muni bond yield to its taxable equivalent. Enter your federal and state brackets to compare munis against taxable bonds fairly.
FinanceApply the Taylor Rule to estimate where the federal funds rate should be from inflation, the inflation target, the output gap, and the neutral rate.
FinanceCalculate your Texas take-home pay with zero state income tax. Enter salary to see federal tax, FICA, and net pay per paycheck in Texas.
FinanceSolve any time value of money variable: future value, present value, payment, periods, or rate. Five solvers in one with compound interest math.
FinanceCalculate overtime pay at time and a half (1.5x) under the FLSA. Enter hourly wage and overtime hours for weekly, monthly, and annual overtime earnings.
FinanceCalculate the times interest earned ratio from EBIT and interest expense. See how comfortably a company covers its debt payments, with benchmarks.
FinanceAdd up weekly hours from clock-in and clock-out times, subtract breaks, and calculate overtime pay at 1.5x. Free, no signup.
FinanceCalculate tips and split the bill in seconds. Compare 15, 18, 20 and 25 percent, handle tax, and see each person's share. Free, no signup.
FinanceCalculate total asset turnover from revenue and average total assets. See how efficiently a company squeezes sales out of its asset base.
FinanceCalculate the Treynor ratio from portfolio return, risk-free rate, and beta. Compare risk-adjusted performance for diversified portfolios.
FinanceCalculate the final price after three successive discounts. See why 20% + 10% + 5% is not 35% off, with total savings and effective discount rate.
FinanceProject a Trump Account (Section 530A) to age 18: the $1,000 federal seed plus your contributions growing in index funds. Free estimator.
FinanceEstimate what tariffs add to your import costs. Enter shipment value, tariff rate, and freight to see duty owed, landed cost, and per-unit impact.
FinanceEstimate UK capital gains tax for 2026/27: £3,000 annual exempt amount, 18% and 24% rates, and Business Asset Disposal Relief.
FinanceWeigh your UK coin jar without a scale. Enter coin counts for 1p to £2 and get total value plus total weight in grams and kilograms.
FinanceCalculate UK National Insurance for 2026/27: 8% employee rate between £12,570 and £50,270, plus the 15% employer cost. See the full employment cost.
FinanceCalculate UK Stamp Duty Land Tax on residential property. Enter the price and buyer type for exact SDLT under current 2026 bands, including first-time relief.
FinanceCalculate UK take-home pay for 2025/26: income tax bands and National Insurance on any salary, with monthly and weekly breakdowns.
FinanceFind your US household income percentile from Census data. Enter your income to see what share of households earn less than you.
FinanceEstimate your weekly unemployment benefit from your wages and your state's max. See total benefits over 26 weeks and how the payment is calculated.
FinanceCalculate the unemployment rate from unemployed and labor force figures. Understand U-3 vs U-6 and what the headline number leaves out.
FinanceCompare price per ounce, per pound or per count across pack sizes and find the real cheapest option. Works with US units. Free, no signup.
FinanceUnlever a stock's beta to strip out the effect of debt. Compare the true business risk of companies with different debt loads.
FinanceCalculate unlevered free cash flow (FCFF) from EBIT, tax, D&A, capex, and working capital change. The cash flow that belongs to the whole firm.
FinanceCalculate what an unpaid day off really costs: lost wages plus the value of your time. Price the trade before you take it.
FinancePut a dollar value on unpaid work: housework, caregiving, volunteering. Enter weekly hours and an hourly value to see the annual contribution.
FinanceEstimate 2026 VA disability compensation by rating and dependents. Uses official VA rates with the 2.8% COLA, including spouse, child, and parent add-ons.
FinanceCalculate your VA loan payment with 0% down and the correct VA funding fee (2.15% first use, 3.3% subsequent). No PMI. Exemption check included.
FinanceAdd VAT to a net price or strip VAT out of a gross price at any rate. Enter the rate yourself; works for every country's VAT or GST system.
FinanceCalculate parametric Value at Risk for a portfolio: daily or monthly VaR at 95% or 99% confidence from volatility and expected return.
FinanceProject variable annuity growth with and without fees. See exactly how much mortality, expense, and rider charges cost over time.
FinanceCalculate the velocity of money from nominal GDP and money supply. See how fast each dollar circulates and what falling velocity means.
FinanceCompute WACC from equity and debt weights, cost of equity, cost of debt, and tax rate. The discount rate for valuations and projects.
FinanceCalculate WACC from equity and debt weights, cost of equity, cost of debt, and tax rate. The discount rate for DCF valuations.
FinanceEstimate website ad revenue from pageviews and RPM. Model display ads, scenarios, and what traffic growth is worth per month.
FinancePlan your wedding budget with smart category breakdowns. Track estimates vs actual spending per vendor and hit your savings target. Free, no signup.
FinanceCalculate week-over-week percentage change for sales, traffic, or any metric. See growth rate, absolute change, and trend direction instantly.
FinanceConvert annual salary to weekly, biweekly, and monthly pay. Or enter hourly wage and hours to see weekly earnings with overtime.
FinanceCalculate a smart offer price on a house: market adjustment, repair costs, and closing fees. Know your opening bid and walk-away number.
FinanceCalculate working capital turnover from revenue and average working capital. See how efficiently short-term assets fund sales.
FinanceCalculate year-over-year growth rate for revenue, profit, or any metric. Compare against the same period last year with clean percentages.
FinanceCalculate approximate yield to call for callable bonds: yield if the issuer redeems at the first call date and price. Compare with yield to maturity.
FinanceCalculate approximate yield to maturity for bonds from price, coupon, face value, and years left. Includes current yield for comparison.
FinanceEstimate YouTube earnings from views and RPM. Model monthly revenue for monetized channels and see what view milestones pay.
FinanceCalculate Zakat on cash, gold, silver, stocks, and business assets minus debts. Simple 2.5% computation with nisab guidance for 2026.
FinanceTurn any phrase into a catchy acronym, or build a backronym from letters with instant word suggestions and pronounceability scoring. Free, client-side.
Data GeneratorsGenerate scannable barcodes online: Code 39, Code 128-B and EAN-13. Rendered on canvas with human-readable text and one-click PNG download. Free.
Data GeneratorsDesign CSS gradients visually with up to 5 color stops, angle control, linear and radial types, and 6 presets. Live preview with copy-ready CSS. Free.
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Data GeneratorsSpin a colorful wheel to pick winners fairly. Add your own options, enjoy realistic spin animation and tick sounds, and review result history. Free.
Data GeneratorsGenerate realistic fake names, emails, phones, addresses, companies and job titles for testing, up to 50 rows. Copy or download CSV or JSON. Free.
Data GeneratorsGenerate MD5, SHA-1, SHA-256 and SHA-512 hash values for any text. Compare hashes and verify file integrity right in your browser. Free, no signup.
Data GeneratorsEnter a topic and get 20 ready-to-copy hashtags grouped by broad, niche and branded reach, plus smart fallback tags for any keyword. Free, no signup.
Data GeneratorsGenerate random lottery numbers for Powerball, Mega Millions, Pick 3, Pick 4 or any custom range. One click re-rolls. Free, instant. Play responsibly.
Data GeneratorsGenerate strong, secure random passwords of any length. Customize character sets, exclude ambiguous characters, and check strength. 100% client-side. Free.
Data GeneratorsPaste names or tickets, set the number of winners, and draw with a fun animated reveal. Winners leave the pool automatically. Free, fair, no signup.
Data GeneratorsGenerate random male, female, or any-gender first and last names in American, British, Hispanic, Italian, French and more styles. Free, no signup.
Data GeneratorsGenerate random integers, decimals, or sets of random numbers within any range. Also generate random names, dice rolls, and coin flips.
Data GeneratorsGet a random famous quote by topic: motivation, success, love, humor or wisdom, correctly attributed to Einstein, Twain, Gandhi and more. Free, no signup.
Data GeneratorsPaste names and split them into fair random teams instantly, by count or size, with Fisher-Yates shuffling. Perfect for classrooms and games. Free.
Data GeneratorsGenerate test credit card numbers for Visa, Mastercard, Amex and Discover that pass the Luhn check. For development and testing only. Free, no signup.
Data GeneratorsGenerate UUID (Universally Unique Identifier) v4 strings online. Generate single or bulk UUIDs, GUID format, formatted or raw. 100% client-side.
Data GeneratorsGet a fresh writing prompt in one click. Pick a genre and tone and receive an original story starter built from 1,000+ combinations. Free, no signup.
Data GeneratorsConvert Snellen fractions like 20/40 to decimal and LogMAR values, and learn what each line on the eye chart really means for your sight.
HealthScore the 4Ts for suspected heparin-induced thrombocytopenia and get the probability band that guides testing and treatment decisions.
HealthGet your full Jim Wendler 5/3/1 cycle: enter 1RMs for press, deadlift, bench and squat to get training maxes and all 4 weeks. Free.
HealthEnter your 5K goal time to get target pace per km and per mile, plus speed in km/h and mph. Free calculator for runners of every level.
HealthCalculate your predicted 6-minute walk distance with the Enright reference equations and compare your actual result to see how you measure up.
HealthCalculate your A Body Shape Index from waist, height, and weight. ABSI refines BMI by measuring belly fat distribution and mortality risk.
HealthCalculate the alveolar-arterial oxygen gradient from ABG values, compare it to the age-adjusted normal, and learn what a high gradient suggests.
HealthCalculate the albumin-globulin ratio from a blood test and learn what high or low A/G ratios suggest about liver and immune health.
HealthInterpret hemoglobin A1C: estimated average glucose (eAG), diagnosis bands, and ADA targets. Explains what raises or lowers A1C. Free.
HealthInterpret arterial blood gas results step by step: identify the primary acid-base disorder, check compensation with Winter's formula, and spot mixed disorders.
HealthCalculate the ankle-brachial index from ankle and arm blood pressures to screen for peripheral artery disease, with AHA interpretation ranges.
HealthCalculate the urine albumin-to-creatinine ratio from a spot urine sample and see KDIGO categories for kidney damage screening.
HealthCalculate the apnea-hypopnea index from sleep study results and learn what normal, mild, moderate, and severe sleep apnea mean.
HealthCalculate the absolute neutrophil count from WBC and differential, with or without bands, and see neutropenia severity bands.
HealthCalculate the APACHE II score from 12 physiologic variables plus age and chronic health, with the standard predicted mortality bands.
HealthCalculate the APRI score for liver fibrosis from AST and platelet count, with WHO interpretation cutoffs for hepatitis B and C.
HealthCalculate the AST to ALT ratio from liver enzymes and learn what ratios above 2 or below 1 suggest about the cause of liver injury.
HealthTake the complete WHO AUDIT alcohol test with all 10 questions, scored 0-40 across four risk zones with guidance for each level.
HealthTake the 3-question AUDIT-C alcohol screener used by clinicians worldwide, with scoring cutoffs for men and women and next-step guidance.
HealthCalculate absolute eosinophil count from WBC and eosinophil percent. Instant AEC with normal, mild, moderate, and severe bands. Free.
HealthCalculate absolute lymphocyte count from WBC and lymphocyte percent. Flags lymphopenia under 1,000 and lymphocytosis over 4,000 per microliter.
HealthUnderstand acetaminophen toxic thresholds: 150 mg/kg for single ingestion, the nomogram window, and when to call Poison Control now.
HealthCheck your added sugar against AHA limits: 36g for men, 25g for women and kids. See grams, teaspoons, and share of calories.
HealthReference the FDA label dosing for Adderall (mixed amphetamine salts) by age: starting doses, titration steps, maximums, and safety warnings.
HealthCalculate a premature baby's corrected age from birth date and due date, the number pediatricians use to track growth and milestones.
HealthCalculate ideal body weight and adjusted body weight for medication dosing in patients whose actual weight exceeds ideal.
HealthCalculate absolute and relative washout from adrenal CT attenuation values to distinguish adenoma from non-adenoma lesions.
HealthCalculate your WMA age-graded running score: enter age, sex, distance and time to see your percentage, open-class equivalent, and level. Free.
HealthApply the age-adjusted D-dimer cutoff (age x 10) for patients over 50 to rule out clots with fewer false positives than the fixed 500 cutoff.
HealthConvert any drink to US standard drinks and UK alcohol units from volume and ABV, and compare against weekly low-risk guidelines.
HealthScore post-anesthesia recovery with the Aldrete system across activity, breathing, circulation, consciousness, and oxygen, with discharge guidance.
HealthLook up standard Aleve (naproxen sodium) OTC label dosing for adults, maximum daily limits, and key safety warnings. Educational reference only.
HealthEstimate maximum allowable blood loss before transfusion from weight, starting hematocrit, and target hematocrit, with the standard OR formula.
HealthScore appendicitis risk with the Alvarado (MANTRELS) system: symptoms, exam findings, and lab values combined into a 10-point decision aid.
HealthSee what published studies report about median survival after an Alzheimer's diagnosis at different ages, with ranges by age band and sex.
HealthFDA-label amoxicillin dosing ranges for children by weight: standard and high-dose regimens. Educational reference; confirm with a clinician.
HealthEstimate your anaerobic threshold heart rate from age or a field test, then set training zones from it. Free calculator with three proven methods.
HealthCalculate the anion gap from basic metabolic panel values, apply albumin correction, and use the delta ratio to detect mixed acid-base disorders.
HealthEstimate aortic valve area from cardiac output and catheter gradient with the Hakki formula, and see severity cutoffs for aortic stenosis.
HealthMeasure your ape index from height and arm span to see if long arms help your deadlift, climbing, or swimming. Free, no signup.
HealthScore a newborn's Apgar at 1 and 5 minutes across appearance, pulse, grimace, activity, and respiration, with what each score means.
HealthFind your archery draw length from wingspan using the standard divide-by-2.5 method. Includes bow sizing guidance for recurve and compound.
HealthCalculate body fat percentage with the official Army tape-test method from neck, waist, and hip measurements, with AR 600-9 standards.
HealthAssess whether your arteries are aging faster than your calendar age from 7 key risk factors, with what each one does to vascular aging.
HealthCalculate arterial pH from PaCO2 and bicarbonate with the Henderson-Hasselbalch equation, and see whether the blood is acidemic or alkalemic.
HealthSee how Australia phased its COVID-19 vaccine rollout, from Phase 1a to Phase 3. Check which priority group you would have been in.
HealthSee average finish times for sprint, Olympic, 70.3 and Ironman triathlons with split breakdowns. Set a realistic goal for your first race.
HealthEstimate blood alcohol content with the Widmark formula from drinks, weight, sex and time since your first drink. For education and planning only. Free.
HealthScore ankylosing spondylitis disease activity with the 6-question BASDAI, and learn what the 4.0 cutoff means for treatment.
HealthEnter daily basal body temperatures to detect the post-ovulation thermal shift and estimate your fertile window each cycle.
HealthAdminister the 15-point Brief Interview for Mental Status used in nursing homes, with repetition, orientation, and recall scoring.
HealthCalculate your Body Mass Index instantly with US or metric units. See your WHO weight category and what BMI means for your health. Free, no signup.
HealthBMI with older-adult interpretation: why healthy ranges shift up after 65, with Lipschitz bands and mortality evidence. Free.
HealthFind your healthy weight range from your BMI and see exactly how much to lose. Get pounds to goal plus a realistic timeline at safe weekly rates.
HealthCalculate your Basal Metabolic Rate with the Mifflin-St Jeor equation from age, sex, height and weight. See daily calories burned at rest. Free.
HealthCalculate the BODE index for COPD from BMI, FEV1, breathlessness and walk distance. Get the 0-10 score plus 4-year survival estimates.
HealthCalculate the BUN to creatinine ratio from kidney labs. Learn what high or low ratios suggest about prerenal, renal, or postrenal causes.
HealthPredict your baby's likely eye color from both parents' eye colors with a simplified genetic model, plus why real inheritance is more complex.
HealthCalculate the true cost per ounce of baby formula from container price and scoops, plus daily and monthly feeding costs.
HealthFind your baby's head circumference percentile by age and sex using WHO growth standard medians. Approximate; pediatrician confirms. Free.
HealthCalculate how much breast milk or formula your baby needs per day and per feed from weight, with AAP-aligned guidance by age.
HealthScore independence in 10 activities of daily living with the Barthel Index, from feeding to stairs, with standard dependence bands.
HealthTake the 21-question Beck Anxiety Inventory, scored 0-63 across minimal to severe bands, with guidance on what each range means.
HealthTest joint hypermobility with the 9-point Beighton score: five simple movements scored on both sides, with age-adjusted cutoffs.
HealthLook up standard Benadryl (diphenhydramine) OTC dosing for adults and children, maximum daily limits, and drowsiness safety warnings.
HealthEstimate your bench press one-rep max from any rep set with the Epley and Brzycki formulas, plus backoff weights for training. Free tool.
HealthGenerate a full bench press pyramid workout from your one-rep max. Ascending, descending, and triangle pyramids with rounded plate loads.
HealthConvert between benzodiazepines with standard diazepam-equivalent doses for education. Taper decisions belong with the prescriber.
HealthScore the 14-item Berg Balance Scale from 0 to 56 and see the fall-risk bands used in rehab, geriatrics, and stroke recovery.
HealthEnter two quantitative hCG blood results to calculate doubling time and see whether the rise falls in the normal early-pregnancy range.
HealthCalculate the bicarbonate deficit in metabolic acidosis from weight and bicarbonate level, with guidance on cautious replacement.
HealthConvert cycling cadence to speed: enter RPM, chainring, cog and wheel size to get km/h, mph, gear inches and development. Free tool.
HealthConvert cycling cadence, chainring, cog, and wheel size into speed in mph and km/h. See how gearing changes speed at any RPM.
HealthCalculate bike chain length from chainstay, chainring and cog size: get inches and link count for a perfect derailleur setup. Free.
HealthCompare bike gears instantly: enter chainring, cog and wheel size for gear inches, ratio, development and speed at any cadence. Free.
HealthEnter ride distance and time to get average cycling speed in mph and km/h plus pace per mile and per km. Free bike pace calculator.
HealthFind your road, mountain, and hybrid bike frame size from your height and inseam, with standover clearance guidance. Free, no signup.
HealthEstimate added life expectancy from regular cycling, based on the University of Utrecht study linking 75 min/week to 6 extra months. Free.
HealthAnswer 6 screening questions based on DSM-5 criteria for binge eating disorder, with guidance on scores and where to find help.
HealthCompare the 1-year and 5-year costs of birth control methods side by side, with typical-use effectiveness for each option.
HealthScore cervical favorability for labor induction with the 5-component Bishop score, and see what favorable vs unfavorable means.
HealthEstimate bladder volume from three ultrasound diameters with the ellipsoid formula, and interpret post-void residual volumes.
HealthEnter your last donation date and type to find your next eligible blood donation date, with US Red Cross intervals for whole blood, platelets, and plasma.
HealthCheck basic blood donor eligibility by age, weight, hemoglobin, and health, with common temporary deferrals explained from Red Cross guidelines.
HealthCheck your blood pressure reading against AHA categories with pulse pressure analysis and clear guidance on what each range means. Free, no signup.
HealthEnter a blood glucose reading in mg/dL or mmol/L with context (fasting, post-meal, random) and see ADA-based interpretation.
HealthEstimate total blood volume in liters from height, weight, and sex with the Nadler formula, plus a weight-based check for comparison.
HealthEstimate body fat with three methods side by side: US Navy tape, YMCA formula, and BMI-based. See all three results plus the average instantly.
HealthEstimate your body fat percentage with the US Navy tape-measure method. Just a few measurements, instant result with category chart. Free, no signup.
HealthFind your body frame size from wrist circumference and height. Learn whether you are small, medium or large framed and what it means for weight goals.
HealthCalculate your Body Roundness Index from waist and height. BRI predicts visceral fat and health risk better than BMI. Free, instant result.
HealthDiscover your body shape from waist, hip and bust measurements. Get your shape type plus what it means for health and clothing fit.
HealthCalculate body surface area with the Du Bois formula plus Mosteller for comparison. Used in drug dosing, burn assessment and cardiac indexing.
HealthEstimate total body water in liters with the clinical Watson formula. Enter age, sex, height and weight for your TBW and hydration percentage.
HealthScore pressure injury risk with the Braden Scale. Rate six clinical factors to get the 6-23 total plus the risk level and prevention steps.
HealthUnderstand the factors that influence breast cancer recurrence: tumor features, nodes, receptors, and genomic tests like Oncotype DX. Educational guide.
HealthReview established breast cancer risk factors: family history, genetics, reproductive factors and lifestyle. Educational, with screening guidance.
HealthFind your breast pump flange size from nipple diameter: measure in mm, add 2-4 mm, match to standard 15-36 mm shields. Free.
HealthCalculate daily calorie needs while breastfeeding. Accounts for milk production plus activity, with guidance for gradual postpartum weight loss.
HealthEstimate VO2max and METs from your Bruce treadmill protocol time with the standard formulas for men and women. Free, no signup.
HealthEstimate calories burned doing burpees from your weight, time, and intensity. See burn per rep, per minute, and per 100 burpees.
HealthTake the 4-question CAGE alcohol screening used by clinicians worldwide. Answer honestly for an instant score and guidance on next steps.
HealthCalculate stroke risk in atrial fibrillation with the CHA2DS2-VASc score. Get the 0-9 score, annual stroke rate, and anticoagulation guidance.
HealthScore alcohol withdrawal with the CIWA-Ar scale: 10 items, max 67. Get severity bands and symptom-triggered treatment thresholds.
HealthEstimate relative COVID exposure risk for an event: setting, crowd size, duration, masks and ventilation. Simplified educational model with clear assumptions.
HealthEstimate COVID-19 mortality risk from age, vaccination, and health factors. Uses published age-stratified IFR with clear caveats. Educational.
HealthScore community-acquired pneumonia severity with CURB-65. Five criteria give the 0-5 score plus mortality and site-of-care guidance.
HealthTrack daily caffeine from coffee, tea, soda and energy drinks. See your total in mg, percent of the 400 mg FDA limit, and when it wears off.
HealthEstimate calories burned cycling from your speed, weight, and ride time using MET values from exercise research. Free, no signup.
HealthEstimate calories burned standing vs sitting using MET values. See what a standing desk really burns in a workday. Free.
HealthSee calories burned for 36 activities using MET values. Enter your weight and duration for an accurate personalized estimate. Free, no signup.
HealthEstimate calories burned from average heart rate, weight, age, and workout time using the Keytel research formula. Free and accurate.
HealthSee how Canada prioritized its COVID-19 vaccine rollout with NACI guidance. Check which priority group you would have been in.
HealthCalculate carboplatin dose with the Calvert formula: dose = AUC x (GFR + 25). Enter target AUC and GFR for the mg dose. Educational only.
HealthCalculate cardiac index from cardiac output and body surface area. Normal range 2.5-4.0 L/min/m2. Instant result with interpretation.
HealthEstimate cardiac output with the Fick principle from oxygen consumption, hemoglobin, and saturations. Includes arterial and venous O2 content.
HealthLook up weight-based cefdinir dosing per the FDA label: 7 mg/kg twice daily or 14 mg/kg once daily, max 600 mg. Informational only.
HealthScore strep throat probability with the Centor/McIsaac criteria. Enter symptoms and age for the score, strep likelihood, and testing guidance.
HealthCalculate cerebral perfusion pressure from blood pressure and ICP. CPP = MAP - ICP, with the 60-70 mmHg target range and interpretation.
HealthCalculate the Charlson Comorbidity Index from 19 conditions plus age. Get the 10-year survival estimate used in prognosis and research.
HealthFind your child's BMI-for-age percentile on CDC growth charts. Enter age, sex, height and weight for an instant percentile and weight category.
HealthEnter both parents ABO and Rh blood types to see the possible and impossible blood types for their children, with inheritance explained.
HealthFind your child's height-for-age percentile on CDC growth charts. Enter age, sex and height for the exact percentile and growth interpretation.
HealthFind your child's weight-for-age percentile on CDC growth charts. Enter age, sex and weight for the exact percentile and interpretation.
HealthScore liver disease severity with the Child-Pugh classification. Enter bilirubin, albumin, INR, ascites and encephalopathy for class and survival.
HealthCalculate total/HDL and LDL/HDL cholesterol ratios from your lipid panel. See the heart-risk bands and what each ratio means.
HealthConvert cholesterol between mg/dL and mmol/L, plus triglycerides. Instant both-way conversion with the standard clinical factors.
HealthDiscover your chronotype with a 5-question simplified morningness-eveningness quiz. Get your ideal sleep window and energy peak times.
HealthPredict ovulation on Clomid (clomiphene). Enter cycle day 1 and your dosing days to get the expected ovulation and fertile window.
HealthReview colorectal cancer risk factors: age, family history, polyps, IBD and lifestyle. Includes USPSTF screening guidance from age 45.
HealthEstimate when conception happened from your due date or last period. Accounts for cycle length with the standard Naegele-based math.
HealthAdjust total calcium for low albumin with the standard correction: corrected Ca = measured + 0.8 x (4.0 - albumin). Instant result.
HealthConvert between corticosteroids: prednisone, dexamethasone, hydrocortisone, methylprednisolone. Anti-inflammatory equivalent doses, informational.
HealthEstimate creatinine clearance with the Cockcroft-Gault equation from age, weight, sex and serum creatinine. Includes CKD staging.
HealthCalculate the Crohn's Disease Activity Index from the 8 weighted components. Get the 0-600 score plus remission and severity bands.
HealthConvert fetal crown-rump length to gestational age with the Robinson formula. Enter CRL in mm for dating plus the estimated due date.
HealthWill the breakaway survive? Enter the gap in meters plus breakaway and peloton speeds to see when the catch happens and how far the break gets.
HealthCalculate personalized cycling heart rate zones from age and resting HR using the Karvonen method. Five training zones with exact bpm ranges.
HealthCalculate your 7 cycling power zones from FTP using the Coggan classic model. Get exact wattage ranges for every training zone.
HealthEnter your ride distance and goal time to find the exact average speed you need in mph and km/h. Plan centuries, time trials, and fondos.
HealthEstimate cycling power in watts from speed, weight, and gradient with the standard physics model. See how hills multiply watts. Free.
HealthCalculate the DAPT score after coronary stenting. Score -2 to 10 guides 12 vs 30 months of dual antiplatelet therapy. Educational.
HealthEstimate functional capacity with the Duke Activity Status Index. Answer 12 yes/no questions for the DASI score, VO2peak and METs.
HealthScore disseminated intravascular coagulation with the ISTH criteria: platelets, fibrin markers, PT and fibrinogen. 5+ indicates overt DIC.
HealthMix WHO-formula hand sanitizer at home: exact mL of alcohol, glycerol, hydrogen peroxide, and water for any batch size. Free.
HealthMake your own sports drink with the right carbs and electrolytes. Enter batch size and get exact grams of sugar, salt, and mix-ins.
HealthCheck diabetic ketoacidosis criteria: glucose, pH, bicarbonate, anion gap and ketones. Includes severity bands and emergency guidance. Educational.
HealthScore diffuse large B-cell lymphoma prognosis with the IPI and revised R-IPI: age, LDH, stage, performance status, extranodal sites.
HealthLook up Dietary Reference Intakes for 14 key nutrients by age and sex: RDA/AI values and upper limits from NIH guidance.
HealthTake the 11-question DUDIT screening for drug use patterns. Instant score with clinical cutoffs for men and women, plus what each band means. Free.
HealthCalculate your daily fat intake target in grams from calories and goal, using the 20-35% AMDR range. Includes saturated fat limits. Free.
HealthSee your recommended daily fiber grams by age and sex, plus high-fiber food values to help you hit your target easily. Free, no signup.
HealthFind your daily water target from your weight, activity level, and climate. See it in milliliters, fluid ounces, and 8-ounce glasses. Free, no signup.
HealthCalculate physiologic dead space fraction with the Bohr equation from arterial and expired CO2. Includes normal values and interpretation.
HealthScore your diet quality with 10 quick questions on fruits, vegetables, whole grains, sugary drinks and more. Get your band plus top fixes.
HealthEstimate calories burned walking your dog by weight, pace and time. Plus the science-backed health benefits of daily dog walks.
HealthEstimate how much of a drug remains in your body after any number of hours using its half-life. Shows percent remaining and time to clear. Free.
HealthAnswer the 10-question DAST screener about drug use patterns and get a risk band with guidance on next steps and support resources.
HealthCalculate your estimated due date from the first day of your last period using Naegele's rule, plus conception date, weeks pregnant, and trimester. Free.
HealthCalculate the Duke Treadmill Score from exercise time, ST depression, and angina. Instant low, moderate, or high risk band with annual mortality. Free.
HealthEstimate your e-bike range from battery capacity, assist level, and terrain. Plan rides with confidence in miles and km.
HealthScore atopic dermatitis with the Eczema Area and Severity Index. Enter signs per body region for a 0-72 score with severity band. Free.
HealthConvert ECG grid boxes to seconds instantly. Small box 0.04 s and large box 0.2 s at 25 mm/s, with 50 mm/s support. Free.
HealthCalculate heart rate from an ECG strip. Enter large or small boxes between R waves for instant bpm, with the 300-150-100-75-60-50 sequence. Free.
HealthCalculate your Estimated Energy Requirement with the Institute of Medicine equations by age, sex, weight, height, and activity level. Free.
HealthScore non-muscle-invasive bladder cancer recurrence and progression risk with the EORTC tables from six clinical factors. 1- and 5-year probabilities. Free.
HealthTake the 10-question Edinburgh Postnatal Depression Scale. Instant 0-30 score with clinical cutoffs and self-harm flag. Free, private.
HealthCalculate effective regurgitant orifice area by the PISA method from aliasing radius and velocities. Mitral and aortic severity bands. Free.
HealthCalculate cardiac output from Doppler echo: LVOT diameter, VTI and heart rate. Stroke volume via CSA x VTI, with normal ranges.
HealthEstimate your chance of a future live birth from frozen eggs by age, using published model data, plus a cost planner for cycles and storage. Free.
HealthCalculate left ventricular ejection fraction from end-diastolic and end-systolic volumes. Instant EF percent with heart failure categories. Free.
HealthEstimate calories burned on the elliptical from body weight, time, and intensity. Based on standard MET values for elliptical training.
HealthPick endotracheal tube size by age or weight: uncuffed and cuffed formulas for children, neonate sizes by weight, adult ranges, and depth. Free.
HealthSee the JCVI 9 priority groups used for the England COVID-19 vaccine rollout. Check which group you would have been in; historical guide.
HealthTake the 8-question Epworth Sleepiness Scale for daytime sleepiness. Instant 0-24 score with normal, mild, moderate, severe bands. Free.
HealthConvert A1C to estimated average glucose in mg/dL and mmol/L with the ADAG formula, or reverse it. Includes the full A1C to eAG table. Free.
HealthEstimate how long ethyl glucuronide stays detectable in urine after drinking, by drinks, hours since, and test cutoff. Informational only. Free.
HealthPlan exclusive pumping: daily milk targets by baby age, per-session goals from your schedule, and CDC storage guidelines. Free.
HealthCalculate fractional excretion of sodium to distinguish prerenal AKI from acute tubular necrosis. Under 1% vs over 2% interpretation. Free.
HealthInterpret spirometry: FEV1/FVC ratio for obstruction plus GOLD 1-4 staging from FEV1 percent predicted. Instant, with severity bands. Free.
HealthCalculate your Fat-Free Mass Index with the natural-limit scale for lifters and see where you fall on the muscularity spectrum. Free, no signup.
HealthCalculate fresh frozen plasma dose by weight: 10-15 mL/kg with unit equivalents (~250 mL each). Quick bedside reference. Free.
HealthCalculate the FIB-4 index from age, AST, ALT, and platelets. Instant low, indeterminate, or high fibrosis risk with AASLD cutoffs. Free.
HealthFind your face shape (oval, round, square, heart, oblong, diamond) from four simple measurements: face length, forehead, cheekbones, jawline. Free.
HealthTake the 6-question Fagerstrom Test for Nicotine Dependence. Instant 0-10 score with very low to very high dependence bands. Free.
HealthCalculate your fat burning heart rate zone (60-70% of max) and learn the truth about fat burn vs total calories. Free, no signup.
HealthTake the 9-item Fatigue Severity Scale. Instant mean score with the 4.0 severe-fatigue cutoff used in MS, lupus, and chronic illness. Free.
HealthCalculate fractional excretion of urea to distinguish prerenal AKI from ATN, even after diuretics. Under 35% vs over 50% guide. Free.
HealthSee monthly conception probability, 12-month cumulative odds, and miscarriage risk by age, from published population data. Free.
HealthEstimate fetal weight from ultrasound biometry with the Hadlock formula and get the growth percentile by gestational age. Free.
HealthScore neonatal abstinence syndrome with the Finnegan tool: 21 withdrawal signs with standard weights and treatment thresholds. For clinical use. Free.
HealthCalculate how many fish oil capsules you need from your target EPA+DHA and capsule strength. General, heart, and triglyceride dosing bands. Free.
HealthCalculate the frailty index from a 25-item deficit checklist. Instant 0-1 score with fit, pre-frail, and frail bands. Free.
HealthCalculate 10-year coronary heart disease risk with the classic Framingham point system: age, cholesterol, HDL, blood pressure, smoking. Free.
HealthCalculate free and bioavailable testosterone from total T, SHBG, and albumin with the Vermeulen equation. Includes reference ranges. Free.
HealthEstimate the free water deficit in hypernatremia. Enter weight, sex, and sodium to get the liters of water needed to return to 140 mEq/L.
HealthCheck fundal height against gestational age: expected cm ≈ weeks from 20-36 weeks, with ±2 cm guidance and when to call your provider. Free.
HealthTake the 7-question GAD-7 anxiety screening. Instant 0-21 score with minimal, mild, moderate, severe bands. Free, private.
HealthCalculate eGFR with the race-free CKD-EPI 2021 creatinine equation, with CKD stages G1-G5, interpretation, and next steps. Free.
HealthCalculate the GRACE risk score for acute coronary syndrome: 8 variables, in-hospital mortality bands, and management implications. Free.
HealthReference gabapentin dosing ranges for neuropathic pain and seizures, with renal adjustments by creatinine clearance. Informational only. Free.
HealthProject weight loss after gastric sleeve: ideal body weight, excess weight, and expected 60-70% excess weight loss timeline. Free.
HealthCalculate gestational age from LMP, conception date, ultrasound CRL, or IVF transfer date. Shows weeks+days and due date. Free.
HealthScore the Glasgow Coma Scale in seconds: eye, verbal, and motor responses sum to 3-15 with severity bands. Free clinical tool.
HealthCalculate glucose infusion rate from dextrose concentration and infusion rate: GIR = D% × mL/hr / (6 × kg). For NICU and critical care. Free.
HealthLook up the glycemic index of 40 common foods, ranked low (55 or under) to high (70+), with explanations of what GI means for meals. Free.
HealthCalculate glycemic load from glycemic index and carbs per serving, or pick from 30 foods with servings. Low/medium/high bands. Free.
HealthCalculate aortic or mitral valve area with the Gorlin formula from cardiac output, heart rate, ejection period, and gradient. Free.
HealthScore the 2015 ACR/EULAR gout classification criteria: entry, clinical, lab, and imaging domains. 8+ points classifies gout. Free.
HealthScore your gut-friendly habits: fiber diversity, fermented foods, activity, sleep, and antibiotic stewardship. Educational, not diagnostic. Free.
HealthCalculate HAS-BLED bleeding risk from 7 factors, with annual major bleeding rates per score. For AF anticoagulation decisions. Free.
HealthScore chest pain with the HEART score: history, ECG, age, risk factors, troponin. 6-week MACE risk bands. Free clinical tool.
HealthReview the established HIV risk factors and testing guidance based on CDC recommendations. Educational checklist, not a clinical prediction.
HealthCalculate HOMA-IR insulin resistance from fasting glucose and insulin, with interpretation bands and what improves it. Free.
HealthEnter your half marathon goal time to get target pace per km and per mile, speed, and split times. Free calculator for 13.1 mile races.
HealthTake the 4-item Subjective Happiness Scale by Lyubomirsky: score your global happiness 1-7 with interpretation. Free, private.
HealthCalculate BMR with the revised Harris-Benedict equation plus TDEE at five activity levels. Compare with Mifflin-St Jeor. Free, no signup.
HealthPlan healthy weight gain with a calorie surplus. Enter current and target weight plus timeline to get the daily surplus needed.
HealthAssess 10-year cardiovascular risk factors: age, smoking, diabetes, blood pressure and cholesterol. Educational review pointing to clinical calculators.
HealthUnderstand heart failure prognosis by NYHA class: approximate 1-year mortality ranges and what improves outlook. Informational only. Free.
HealthMeasure heart rate recovery after exercise: the drop in bpm one minute after stopping. A key marker of cardiovascular fitness.
HealthCalculate your 5 heart rate training zones from max heart rate. See the bpm range for recovery, fat burn, tempo, threshold and max. Free.
HealthFind your max heart rate with the Tanaka formula and get all 5 Karvonen training zones from your age and resting heart rate. Free, no signup.
HealthConvert height between cm and feet/inches, plus predict a child's adult height from parents' heights (mid-parental method). Free.
HealthEstimate height from knee height for patients who cannot stand, using the validated Chumlea equations by sex and age. Free.
HealthConvert hematocrit to hemoglobin and back with the clinical rule of three: Hgb ≈ Hct/3. Instant both-direction conversion. Free.
HealthCalculate the Hepatic Steatosis Index from ALT, AST, BMI, sex, and diabetes status. Rules fatty liver in or out reliably. Free.
HealthEstimate hiking time with Naismith's rule and calories burned from distance, elevation gain, and weight. Plan any trail. Free.
HealthEstimate hiking time from distance and elevation gain using Naismith rule. Plan day hikes with realistic timings in hours and minutes.
HealthSee how fast a parked car heats up at any outside temperature. Learn when the interior turns deadly for children and pets, minute by minute.
HealthSee typical protection durations for common vaccines, from lifelong MMR to annual flu. Enter your last dose date for a booster estimate.
HealthExplore the vaccine development pipeline from lab to vial. Enter a start year to see typical milestones across the 10-15 year path from discovery to licensure.
HealthReference hydroxychloroquine dosing: ≤5 mg/kg/day real-weight limit, indications, and retinal screening schedule. Informational only. Free.
HealthScore intracerebral hemorrhage prognosis with the validated ICH Score. GCS, bleed volume, IVH, location, and age predict 30-day mortality.
HealthMeasure intracerebral hemorrhage volume with the ABC/2 method from CT: largest diameter, perpendicular width, and slice count give bleed size in cm3.
HealthIf It Fits Your Macros: daily calories, protein, carbs, and fat from your stats and goal. Flexible dieting targets that work with any food.
HealthConvert prothrombin time to INR with the ISI correction: INR = (PT/MNPT)^ISI. Check whether your result sits in the 2.0 to 3.0 therapeutic range.
HealthConvert any IQ score to its percentile rank on the standard scale (mean 100, SD 15). See exactly what share of people score below you.
HealthCalculate IV drip rates in drops per minute and mL per hour from volume, time and drop factor. Includes macrodrip vs microdrip guidance.
HealthCalculate IV flow rates: mL per hour from volume and time, and drops per minute from the tubing drop factor. For nursing math practice and checks.
HealthCalculate your IVF due date from egg retrieval, day-3 transfer, or day-5 blastocyst transfer. Includes gestational age and trimester dates.
HealthCalculate IVIG total dose at 2 g per kg with standard 5-day and 2-day regimens, infusion rates, and rate escalation. Confirm with the prescriber.
HealthReference ibuprofen dosing: adult OTC limits and pediatric 10 mg/kg dosing with max daily caps. Safety warnings included. Free.
HealthGet your healthy weight range from height using the Devine, Robinson, Miller and Hamwi clinical formulas side by side. Free, no signup.
HealthFind your likely implantation window from ovulation or conception date. Implantation usually happens 6 to 12 days after ovulation, most often days 8 to 10.
HealthCalculate disease incidence rate from new cases and population at risk. Express results per 1,000 or 100,000 person-time, the epidemiology standard.
HealthSee how India phased its COVID-19 vaccination drive, from healthcare workers to 18+. Check which phase you would have been in.
HealthWeight-based infant acetaminophen dosing: 10 to 15 mg per kg per dose every 4 to 6 hours. Confirm every dose with your pediatrician first.
HealthScore trauma with the Injury Severity Score: enter AIS per body region and get the 0 to 75 score that predicts mortality and guides trauma triage.
HealthEstimate total daily insulin, carb ratio (500 rule), and correction factor (1800 rule) from weight. Starting estimates only, confirm with your doctor.
HealthInterpret iron labs the way clinicians do: ferritin under 30, transferrin saturation under 20 percent, and hemoglobin against WHO anemia cutoffs.
HealthPlan isotretinoin (Accutane) dosing: cumulative 120 to 150 mg per kg target and daily 0.5 to 1 mg per kg. Confirm with your dermatologist.
HealthEstimate calories burned jumping rope from body weight, time, and intensity. One of the highest-burn cardio exercises per minute.
HealthCalculate target heart rate zones with the Karvonen formula using heart rate reserve. Personalized training zones from your max and resting HR.
HealthCalculate BMR with the Katch-McArdle formula using your lean body mass. Best BMR equation for muscular or lean athletes. Free, no signup.
HealthKeto macros done right: net carbs under 50 g, protein to protect muscle, and fat filling the rest. Daily targets from your stats and goal.
HealthEstimate 2-year and 5-year kidney failure risk with the validated 4-variable KFRE from age, sex, eGFR, and urine albumin-creatinine ratio.
HealthEstimate spontaneous passage odds from kidney stone size, plus the daily fluid target that best prevents new stones. Size-based, evidence-informed.
HealthCalculate single-pool Kt/V with the Daugirdas second-generation formula from pre/post BUN, hours, fluid removed, and weight. Target 1.2 or higher.
HealthCalculate LDL cholesterol with the Friedewald equation from total cholesterol, HDL, and triglycerides. Includes ATP III target ranges by risk.
HealthScore necrotizing soft tissue infection risk with LRINEC: CRP, WBC, hemoglobin, sodium, creatinine, and glucose give a 0 to 13 risk score.
HealthCalculate left ventricular mass and LVMI from echo measurements with the Devereux formula, indexed to body surface area. ASE normal cutoffs included.
HealthEstimate lean body mass from height, weight and sex with the Boer, James and Hume clinical formulas. Instant results, free, no signup.
HealthEstimate levothyroxine replacement at 1.6 mcg per kg per day with elderly and cardiac starting-dose guidance. Confirm every dose with your doctor.
HealthCalculate maximum safe lidocaine dose: 4.5 mg per kg plain, 7 mg per kg with epinephrine. Converts to mL of 1% and 2% solutions instantly.
HealthApply Light's criteria to pleural fluid: protein and LDH ratios separate exudates from transudates and point toward the cause of the effusion.
HealthCalculate the Lille score for alcoholic hepatitis: day-7 bilirubin change on steroids predicts non-response at the 0.45 cutoff. For clinical use.
HealthMaximum safe doses for lidocaine, bupivacaine, ropivacaine, mepivacaine, prilocaine, and articaine by weight, plain or with epinephrine.
HealthA simplified educational estimator of lung cancer risk from smoking history: pack-years, quit time, age, family history, and COPD. Not a validated model.
HealthEstimate predicted vital capacity from age, sex, and height with the Baldwin equations. Compare your spirometry result to the predicted value.
HealthCalculate lung nodule volume doubling time from two CT measurements. VDT under 400 days raises concern; over 500 days suggests benign behavior.
HealthCalculate luteal phase length from cycle length and ovulation day. Normal is 12 to 14 days; under 10 may signal a short luteal phase.
HealthCalculate the MELD score from bilirubin, INR, and creatinine, with the MELD-Na variant. The 6 to 40 score that prioritizes liver transplant waitlists.
HealthAdd up your weekly exercise into MET-minutes, the standard activity dose, and see how you compare to WHO guidelines. Free, no signup.
HealthCalculate the Modified Early Warning Score from vitals: systolic BP, heart rate, respiratory rate, temperature, and consciousness. Flags deterioration early.
HealthCalculate the Mantle Cell Lymphoma International Prognostic Index from age, ECOG, LDH ratio, and WBC. Low, intermediate, and high risk groups.
HealthConvert opioid doses to morphine milligram equivalents per day with CDC factors. Flags the 50 and 90 MME caution thresholds. Educational only.
HealthGet your daily protein, carb and fat targets for cutting, maintaining or bulking, with per-meal splits. Free, no signup.
HealthCalculate Maddrey's discriminant function for alcoholic hepatitis severity. DF >= 32 indicates severe disease; includes the formula and interpretation.
HealthRun Jeff Galloway's one-mile time trial, enter the time, and predict your 5K, 10K, half marathon and marathon pace. Free, no signup.
HealthConvert magnesium between mg/dL, mmol/L and mEq/L instantly. Includes the normal range in all three units and clinical notes.
HealthSee how Malaysia phased its COVID-19 immunisation programme from frontliners to all adults. Check which phase you would have been in.
HealthEnter a goal marathon time and get the exact pace per mile and per km you need, plus 5K, 10K and half marathon split targets. Free, no signup.
HealthEstimate maximum heart rate with the Tanaka, Gellish, and classic formulas. Compare all three and set training zones from the best one.
HealthEstimate your maximum heart rate with the 220-age, Tanaka, and Gulati formulas. Compare methods and learn which fits you. Free.
HealthTurn any meal's protein, carbs, fat, fiber, and alcohol grams into calories. See the macro split and net carbs for the whole plate.
HealthCalculate mean airway pressure from PIP, PEEP, and inspiratory/expiratory times. MAPaw tracks oxygenation and barotrauma risk on the ventilator.
HealthCalculate mean arterial pressure from systolic and diastolic BP: MAP = DBP + 1/3(SBP - DBP). Flags the 65 mmHg perfusion threshold.
HealthCalculate mean sac diameter from three ultrasound measurements and estimate gestational age: MSD in mm plus 30 days approximates days of gestation.
HealthAdd up medical imaging radiation in millisieverts: X-rays, CT scans, mammograms, and nuclear scans, compared against yearly background radiation.
HealthEstimate cumulative medical radiation dose in millisieverts from common imaging exams, compared with natural background radiation and chest X-ray equivalents.
HealthCalculate weight-based medication doses, liquid volumes and tablet counts. Informational only: always confirm with your clinician or pharmacist.
HealthBuild a 3-times-daily medicine schedule from your first dose time. Evenly spaced doses inside waking hours so you never guess at timing.
HealthEvidence-based melatonin dosing: start 0.5 to 1 mg, typical range up to 5 mg, timing 1 to 2 hours before bed. Informational only, not medical advice.
HealthSeparate iron deficiency from thalassemia trait with the Mentzer index: MCV divided by RBC. Above 13 suggests iron deficiency; below 13 thalassemia.
HealthCheck metabolic syndrome with the ATP III criteria: waist, triglycerides, HDL, blood pressure, and fasting glucose. Three or more means syndrome.
HealthReview the validated prognostic factors in metastatic prostate cancer: Gleason, PSA, visceral mets, performance status, LDH, and anemia. Educational only.
HealthCompare your daily vitamin and mineral intake against NIH recommended dietary allowances for 8 key micronutrients, adjusted for age and sex.
HealthCalculate mitral valve area from pressure half-time: MVA = 220 / PHT. Grades mitral stenosis as mild, moderate, or severe by ASE cutoffs.
HealthScore inpatient fall risk with the Morse Fall Scale: history, diagnosis, aid, IV, gait, and mental status give a 0 to 125 risk score.
HealthCalculate mortality rate from deaths and population, expressed per 1,000 or 100,000. Includes case fatality rate for comparison.
HealthCalculate the NAFLD fibrosis score from age, BMI, diabetes, AST/ALT, platelets, and albumin. Rules out advanced fibrosis at -1.455.
HealthCalculate the NEDOCS emergency department overcrowding score from census, boarding, ventilators, wait times, and walkouts. 0 to 200+ scale.
HealthScore stroke severity with the full 15-item NIH Stroke Scale. Standardized neuro exam totaling 0 to 42, used for tPA decisions and prognosis.
HealthCalculate the neutrophil-to-lymphocyte ratio from CBC differential. An emerging inflammation and prognosis marker across infections and cancer.
HealthCalculate number needed to treat from control and experimental event rates. The clearest single number for how well a treatment works.
HealthCalculate net carbs from total carbs, fiber, and sugar alcohols. The digestible carb count for keto, low-carb, and diabetic carb counting.
HealthSee how the Netherlands ordered its COVID-19 vaccination by age bands. Check which group you would have been in.
HealthCalculate safe noise exposure time and daily dose with the NIOSH 85 dBA standard and 3-dB exchange rate. Protect your hearing with real numbers.
HealthSee the JCVI 9 priority groups used for the Northern Ireland COVID-19 vaccine rollout. Check which group you would have been in; historical guide.
HealthInterpret nuchal translucency in mm: under 3.0 typically reassuring, 3.5+ increases risk. Understand NT within first-trimester combined screening.
HealthEstimate your one rep max with the Epley, Brzycki and Lombardi formulas, then get a full training percentage table. Free, no signup.
HealthConvert any opioid prescription to morphine milligram equivalents (MME) per day using CDC conversion factors. See where the dose lands against CDC risk thresholds.
HealthScore your osteoporosis risk from age, weight, fracture history, and key risk factors. A simple screening aid based on bone-health risk factors named by the Bone Health and Osteoporosis Foundation.
HealthFind your most fertile days and ovulation date from your cycle length. Clear calendar view for any cycle length. Free, no signup.
HealthCompute the oxygenation index (OI) from FiO2, mean airway pressure, and PaO2. Used in ICU and neonatal care to grade hypoxemic respiratory failure severity.
HealthApply the PECARN pediatric head injury decision rule for children under 18 with minor head trauma. Checks the validated predictors for clinically important brain injury.
HealthApply the 8-item PERC rule to determine whether pulmonary embolism can be ruled out without further testing in low-risk emergency patients.
HealthTake the PHQ-9 depression screening used by clinicians worldwide. Answer 9 questions for your score (0-27) and severity band.
HealthQuantify mitral regurgitation with the PISA method: enter radius, aliasing and peak velocity to get EROA and severity grade.
HealthCalculate PSA density from PSA level and prostate volume. A sharper tool than PSA alone for judging biopsy need, with the 0.15 risk threshold.
HealthCalculate PSA doubling time and PSA velocity from two PSA readings and the days between them. Key kinetics urologists use for surveillance decisions.
HealthCalculate the Pneumonia Severity Index (PORT score) for community-acquired pneumonia: 20 variables scored to predict mortality and guide admission decisions.
HealthCalculate the P/F ratio from arterial oxygen and inspired oxygen fraction, then grade ARDS severity using the Berlin definition cutoffs clinicians use at the bedside.
HealthConvert running pace between min/mile and min/km, get speed in mph and km/h, and check what any time means over any distance. Free, no signup.
HealthConvert cigarettes per day and years smoked into pack-years, the standard measure of lifetime smoking exposure used for lung cancer screening eligibility.
HealthCalculate pack-years smoked, the key measure for lung screening eligibility, plus lifetime cost. Enter packs per day and years smoked.
HealthScore venous thromboembolism risk in hospitalized medical patients with the 11-item Padua prediction score. Identifies who needs clot-prevention measures.
HealthCalculate weight-based paracetamol (acetaminophen) doses for children and adults: single dose range, dosing interval, and maximum daily limits with safety warnings.
HealthCalculate 24-hour fluid resuscitation for burn patients with the Parkland formula: 4 mL x kg x percent TBSA, split into the first 8 hours and next 16 hours.
HealthEstimate predicted peak expiratory flow from age, sex, and height using Nunn and Gregg reference equations, then see your percent of predicted and asthma zone.
HealthCompute the Pearl Index from pregnancies, women studied, and months of exposure. The standard measure of contraceptive effectiveness used in clinical trials.
HealthCheck a child blood pressure reading against the AAP 2017 simplified screening table by age and sex, with hypertension staging for teens 13 and older.
HealthEstimate total blood volume in children from weight and age group using standard mL-per-kg values. A quick reference for students, parents, and clinicians.
HealthConvert an adult medicine dose to a child dose using Clark weight rule and Young age rule. Educational reference with worked examples and safety limits.
HealthCalculate weight-based epinephrine dosing for pediatric anaphylaxis: IM dose at 0.01 mg/kg plus auto-injector selection by weight band, with safety caps.
HealthScore daytime sleepiness in children and teens with the 8-question pediatric Epworth scale. See what the total means and when to talk to a clinician.
HealthEstimate glomerular filtration rate in children with the bedside Schwartz formula from height and serum creatinine, with CKD staging for context.
HealthCalculate pediatric maintenance IV fluids with the Holliday-Segar method and the 4-2-1 hourly rule from weight in kg. Includes daily totals.
HealthEstimate pediatric transfusion volumes: packed red cells, fresh frozen plasma, and platelets by weight using standard mL-per-kg dosing ranges.
HealthCalculate peptide reconstitution: vial size and bacteriostatic water to dose in mcg, syringe units, and doses per vial. Informational only, confirm with a clinician.
HealthPredict upcoming periods and fertile windows from your cycle length with a 6-month calendar view for easy cycle planning. Free, no signup.
HealthSee the Philippines A1-A5 COVID vaccine priority framework. Check which priority group you would have been in.
HealthEstimate plasma volume from weight and hematocrit with the Kaplan formula, compare with ideal volume, and get plasma volume status for congestion assessment.
HealthCalculate the ponderal index from weight and height. An anthropometric alternative to BMI that scales weight against height cubed, with interpretation bands.
HealthEstimate time since death from body temperature with the Glaister equation, plus rigor and livor mortis timelines. Educational forensic science.
HealthCalculate your due date and see how many weeks pregnant you are, with a trimester breakdown week by week. Free, no signup.
HealthFind the earliest and best dates to take a pregnancy test from your last period or ovulation date, based on hCG detection windows and cycle math.
HealthEstimate false negative risk for a home pregnancy test by days past ovulation and test sensitivity, with when-to-retest guidance. Free.
HealthReview venous thromboembolism risk factors in pregnancy from RCOG guidance. Check which apply and discuss prophylaxis with your provider.
HealthSee recommended pregnancy weight gain by pre-pregnancy BMI with IOM guidelines, trimester breakdowns, and weekly tracking guidance. Free, no signup.
HealthCalculate your next prescription refill date from the last fill date and days supply. Never run out of daily medication again with a refill reminder date.
HealthCalculate the progesterone to estradiol ratio used in fertility assessment, with the x1000 convention clinics use and context for trigger-day interpretation.
HealthEstimate prostate volume in cc from ultrasound dimensions using the ellipsoid formula. Includes size categories and context for PSA density calculations.
HealthCalculate the spot urine protein to creatinine ratio and convert it to estimated daily protein excretion, with nephrotic-range thresholds explained.
HealthFind your daily protein target from weight, goal and activity level, with per-meal splits for cutting, maintaining or building muscle. Free, no signup.
HealthCalculate pulmonary vascular resistance from right heart catheterization numbers: mean PA pressure, wedge pressure, and cardiac output, in Wood units and dynes.
HealthCalculate corrected QT interval with Bazett and Fridericia formulas from QT and heart rate. Includes prolonged-QTc thresholds by sex and torsades risk bands.
HealthCalculate the QUICKI insulin sensitivity index from fasting insulin and glucose. A research-validated check for insulin resistance with interpretation bands.
HealthCalculate the Qp/Qs shunt ratio from oxygen saturations to quantify left-to-right shunts like ASD and VSD, with significance thresholds cardiologists use.
HealthCalculate MCV, MCH, and MCHC from a CBC and interpret the pattern: microcytic, normocytic, or macrocytic anemia with likely causes for each.
HealthEstimate major cardiac complication risk for non-cardiac surgery with the 6-factor Revised Cardiac Risk Index, with risk percentages per class.
HealthEstimate your sleep cycles, REM sleep minutes, and deep sleep from total sleep time. Learn how 90-minute cycles shape the night.
HealthCalculate the rapid shallow breathing index (respiratory rate divided by tidal volume) to predict weaning success from mechanical ventilation.
HealthBuild an even-splits pacing table for any race: enter goal time and distance to get every mile or km split and cumulative checkpoint. Free tool.
HealthPredict race times at any distance from a recent result using the Riegel formula. 5K to marathon predictions in seconds.
HealthPredict race times across distances with the Riegel formula: enter one race result to predict your 5K, 10K, half marathon or marathon. Free.
HealthCalculate the rate pressure product (double product) from heart rate and systolic blood pressure. A bedside index of myocardial oxygen demand.
HealthEstimate body fat percentage with the Relative Fat Mass formula from height, waist, and sex. A validated, scale-free alternative to BMI.
HealthCorrect the reticulocyte count for anemia severity and compute the reticulocyte production index (RPI) to judge whether the marrow is responding.
HealthWork backward from a due date to estimate the conception date and last menstrual period. Simple Naegele-rule math with calendar dates.
HealthCalculate the Revised Geneva Score for PE probability from 8 clinical variables, with three-level and two-level interpretations used in emergency care.
HealthCalculate the Revised Trauma Score from coded GCS, systolic blood pressure, and respiratory rate. The classic physiologic triage score for trauma patients.
HealthConvert rowing machine pace per 500m to watts and back using the official Concept2 formula. For rowers, CrossFitters, and HIIT athletes.
HealthEstimate calories burned running or walking from body weight and distance. Uses the standard 1 kcal per kg per km rule.
HealthCalculate running pace per km and per mile, speed in km/h and mph, and predict 5K, 10K, half marathon and marathon times with the Riegel formula. Free.
HealthCalculate the serum-ascites albumin gradient from serum and ascitic fluid albumin to distinguish portal-hypertensive from non-portal causes of ascites.
HealthCalculate the Simplified Acute Physiology Score II from 15 physiologic variables plus age and admission type, with predicted hospital mortality.
HealthCalculate the SCORAD index for eczema severity from affected area, six intensity signs, and itch plus sleep loss, with mild/moderate/severe bands.
HealthSimulate how infections spread with the classic SIR model. Adjust R0, population, and days to see the peak and total infected.
HealthCalculate the Score for Neonatal Acute Physiology II from 6 physiologic variables for newborns in intensive care, with severity interpretation.
HealthCalculate the SOFA score from six organ systems. Enter vitals and labs to get the 0-24 score used in ICUs worldwide since 1996.
HealthTake the 8-question STOP-Bang screening for obstructive sleep apnea. Answer yes or no to get your risk level and next steps.
HealthCheck how fast serum sodium may rise safely. Enter current and target sodium to get the 24-hour limit and the minimum safe correction time.
HealthEstimate calories burned in a sauna session and learn the honest truth about sauna weight loss claims. MET-based estimate. Free.
HealthSee the JCVI 9 priority groups used for the Scotland COVID-19 vaccine rollout. Check which group you would have been in; historical guide.
HealthScreen for sepsis with SIRS criteria, qSOFA, and the Sepsis-3 definitions. Combines bedside signs into a clear escalate-or-monitor recommendation.
HealthCalculate serum osmolality from sodium, BUN, and glucose, compare with measured osmolality, and get the osmolar gap with interpretation.
HealthCalculate the shock index from heart rate and systolic blood pressure. A simple early warning of occult shock and bleeding risk used in ER and trauma care.
HealthEstimate body fat percentage from 3-site skinfold measurements with the Jackson-Pollock equations and Siri conversion, for men and women.
HealthFind the best time to sleep or wake up using 90-minute sleep cycles. Fall asleep faster and wake up refreshed. Free, no signup.
HealthTotal your weekly sleep deficit and estimate recovery time, with safe catch-up guidance based on your sleep need vs actual hours. Free, no signup.
HealthFind your recommended sleep range by age, score your sleep efficiency from time in bed versus asleep, and see your nightly sleep debt.
HealthEnter your quit date to see days smoke-free, money saved, and the health recovery milestones you have hit, based on published cessation timelines.
HealthEstimate calories burned shoveling snow from body weight, time, and effort. Shoveling is real exercise with real risks.
HealthCount your days sober from your quit date and track AA-style chip milestones: 24 hours, 30, 60, 90 days, 6 months, 9 months, and yearly anniversaries.
HealthCalculate maximum safe room occupancy with physical distancing: enter room dimensions and spacing to get the distanced capacity for events and venues.
HealthTrack sodium movement between lab draws. Enter two sodium values and the hours between to get the change and the 24-hour correction pace.
HealthCorrect serum sodium for high blood sugar with the Katz formula. Enter measured sodium and glucose to reveal the true sodium level underneath.
HealthEstimate the sodium deficit in hyponatremia from weight, sex, and lab values. Shows total body water and the mEq needed to reach target sodium.
HealthConvert salt to sodium in milligrams. Enter salt by weight or spoon to see the sodium content and share of the 2,300 mg daily limit.
HealthSee how South Africa phased its COVID-19 vaccine rollout from health workers to all adults. Check which phase you would have been in.
HealthInterpret semen analysis results against WHO 2021 reference values. Enter your numbers to see which parameters meet the reference limits.
HealthEstimate calories burned climbing stairs from body weight, time, and intensity. Stairs are one of the best free workouts available.
HealthConvert any drink to US standard drinks. Enter volume and ABV to get standard drinks and grams of pure alcohol.
HealthConvert daily steps to calories burned based on your weight. See what 10,000 steps really burns for you. Free, no signup.
HealthConvert steps to distance and calories burned, or find how many steps you need for a calorie goal, adjusted for weight and pace. Free, no signup.
HealthConvert step count to kilometers and miles using your height-based stride length. Works for walking and running step counts.
HealthConvert steps to miles using your real stride length, or estimate stride from height. More accurate than the 2,000-step rule. Free.
HealthLearn the known stillbirth risk factors from CDC and ACOG guidance. An educational checklist to bring to prenatal visits, not a personal prediction.
HealthEstimate stride length from height for walking and running. Measure your real stride and calibrate for accurate distance tracking.
HealthCalculate stroke volume two ways: from cardiac output and heart rate, or from echo LVOT diameter and VTI. Normal range 50-100 mL.
HealthEstimate calories burned swimming by stroke, weight, and time using MET values. Compare freestyle, breaststroke and more. Free.
HealthPredict swim time from distance and pace per 100m, or find the pace you need for a goal time. For pool swimmers and triathletes.
HealthExplore the Swiss cheese model of pandemic defense. Check which protective layers you use and see how they stack against respiratory viruses.
HealthFind how many calories you need per day to maintain, lose or gain weight. Uses the Mifflin-St Jeor equation with activity levels. Free, no signup.
HealthScore thyroid nodules with ACR TI-RADS. Select the five ultrasound features to get the TR1-TR5 level and biopsy or follow-up guidance.
HealthCalculate the TIMI risk score for STEMI from 8 bedside variables. Get the 0-14 score and the 30-day mortality from the Morrow trial data.
HealthCalculate the 7-point TIMI risk score for unstable angina and NSTEMI. Get the 30-day risk of death, MI, or urgent revascularization.
HealthCalculate the transtubular potassium gradient from urine and serum labs. See whether the kidneys are handling potassium correctly in hyperkalemia.
HealthFind your target heart rate zones with the Karvonen formula using max and resting heart rate. More personal than age-only estimates. Free.
HealthBMI calculator for teenagers using CDC BMI-for-age percentiles. Enter age, sex, height and weight to get the percentile and weight category for ages 13 to 19.
HealthCalculate the testosterone-to-estradiol (T/E2) ratio from lab values. Learn what the ratio reflects and why it is not a treatment target.
HealthCalculate ideal tidal volume from predicted body weight. Enter height and sex to get the 6-8 mL/kg lung-protective ventilation range.
HealthScore the Tinetti Performance Oriented Mobility Assessment. Enter balance and gait observations to get the 0-28 fall risk score.
HealthEnter a recent race time to get your Jack Daniels VDOT and exact training paces: easy, marathon, threshold, interval, repetition. Free tool.
HealthLook up FDA label tramadol dosing ranges by formulation and age. Informational reference only; confirm every dose with your prescriber.
HealthCalculate transferrin saturation from serum iron and TIBC. See whether iron saturation suggests deficiency, normal status, or overload.
HealthSet target heart rate ranges for swim, bike, and run legs using the Karvonen method, tuned to typical triathlon race intensities. Free.
HealthEstimate your triathlon finish time from swim pace, bike speed, run pace, and transitions. All four distances covered.
HealthBuild a triathlon training structure from your race distance, weeks available, and current fitness. Get weekly hours and session splits.
HealthGet IOM weight gain targets for twin pregnancy by pre-pregnancy BMI. See the recommended total range and weekly pace.
HealthEstimate how common factors shift twin likelihood. See how age, family history, and fertility treatment change the baseline odds.
HealthLook up acetaminophen dosing by age and weight from the label. Informational reference with daily maximums; confirm with your pharmacist.
HealthScore your type 2 diabetes risk with the official ADA risk test questions and see what your score means for next steps. Free, no signup.
HealthSee the JCVI 9 priority groups used for the UK COVID-19 vaccine rollout. Check which group you would have been in; historical guide.
HealthCalculate the urea reduction ratio from pre- and post-dialysis BUN. Check whether dialysis meets the 65% KDOQI adequacy target.
HealthCheck which vaccines US adults need by age per CDC guidance: flu, Tdap, shingles, pneumococcal, RSV, and COVID recommendations.
HealthCalculate the urine anion gap from urine sodium, potassium, and chloride. Distinguish GI bicarbonate loss from renal tubular acidosis causes.
HealthCheck whether urine output is normal. Enter urine volume, weight, and hours to get mL/kg/hr with oliguria and anuria thresholds.
HealthReview the six key factors behind VBAC success from the Grobman model. Check which favorable factors apply and discuss them with your OB.
HealthEstimate VLDL cholesterol from triglycerides with the Friedewald equation. Enter triglycerides in mg/dL to get VLDL and context.
HealthEstimate VO2 max from resting heart rate or a 1.5-mile run time, with age and sex ratings and your estimated fitness age. Free, no signup.
HealthEstimate VO2 max from resting and max heart rate using the Uth et al. formula. Includes fitness ratings by age and sex.
HealthCalculate vaccine efficacy from trial case counts. Enter cases and group sizes to get attack rates and the efficacy percentage.
HealthInterpret venous blood pH and estimate the arterial value. Enter venous pH to get the expected arterial pH and acid-base context.
HealthEstimate predicted vital capacity from age, height, and sex with the Baldwin equations. Compare measured spirometry to predicted values.
HealthCheck vitamin A intake against the RDA and 3,000 mcg upper limit. Enter mcg RAE to get percent of daily need and safety margin.
HealthCheck vitamin D intake in IU and mcg against the RDA and upper limit, and interpret blood 25(OH)D levels in ng/mL.
HealthLook up the recommended daily allowance for any vitamin by age and sex, with upper limits and top food sources. Based on NIH reference values.
HealthCalculate your waist to hip ratio and see your health risk category based on WHO cutoffs for men and women. Free, no signup.
HealthCheck your waist-to-height ratio with risk categories based on the keep your waist under half your height rule. Simple, fast, and free, no signup.
HealthUnderstand thrombolysis eligibility when stroke onset is unknown. Learn the DWI-FLAIR mismatch criteria from the WAKE-UP trial.
HealthSee the JCVI 9 priority groups used for the Wales COVID-19 vaccine rollout. Check which group you would have been in; historical guide.
HealthEstimate calories burned walking by pace, weight, and time with research MET values. From strolling to power walking. Free.
HealthLook up warfarin initiation dosing: standard vs sensitive starting doses, INR targets, and monitoring. Informational; your clinic sets doses.
HealthCalculate fat-protein units (FPUs) for insulin pump dosing. Enter meal fat and protein to get FPUs, carb equivalent, and bolus timing.
HealthEstimate calories burned lifting weights from body weight, session length, and intensity. Based on standard MET values for resistance training.
HealthPlan healthy weight loss: enter current and goal weight plus timeline to get your daily calorie target using Mifflin-St Jeor. Free.
HealthCalculate your weight loss as a percentage of starting weight. See whether you have hit the clinically meaningful 5% and 10% milestones.
HealthGet a week-by-week timeline from your current weight to your goal with safe-deficit guardrails and realistic weekly loss targets. Free, no signup.
HealthEstimate classic Weight Watchers Points from calories, fat, and fiber. Based on the original published formula; WW's current plan is proprietary.
HealthProject your weight week by week at a steady pace. Enter start weight, weekly change, and weeks to see the full projection table.
HealthCalculate the Wells score for suspected pulmonary embolism. Answer 7 clinical items to get the PE likely or unlikely classification.
HealthFind the earliest and best day to take a urine pregnancy test from your LMP. Based on hCG rise timing and missed period dating.
HealthCalculate your Wilks score from bodyweight and total with the official 2020 formula, plus the classic version for comparison. Free, no signup.
HealthCheck respiratory compensation in metabolic acidosis with Winter's formula. Enter bicarbonate to get the expected pCO2 range.
HealthCheck hCG doubling time and 48-hour rise from two beta-hCG values. Interprets viability thresholds from published data. Free.
HealthConvert between micrograms and IU for vitamins D, A, and E with the official factors: D 40 IU per mcg, A 3.33 per mcg RAE, E 1.49 per mg.
HealthConvert lab values between mmol/L and mg/dL for glucose, cholesterol, triglycerides, BUN, and creatinine with the standard medical factors.
HealthCalculate the quick SOFA score from respiratory rate, blood pressure, and mental status. The 3-item bedside screen for poor outcomes in suspected infection.
HealthLook up the alteplase dosing scheme for stroke: 0.9 mg/kg, 10% bolus, 60-minute infusion, 90 mg max. Hospital use only, informational.
HealthFind the right AC size with our free BTU calculator. Enter room dimensions, sun exposure, and climate to size your air conditioner perfectly.
Home & DecorSize your air purifier with our free CADR calculator. Get the right air changes per hour for allergies, pets, and wildfire smoke.
Home & DecorSee what each appliance costs you with our free energy cost calculator. Enter wattage and hours to reveal monthly and yearly running costs.
Home & DecorGet exact blind measurements with our free size calculator. Inside and outside mount rules, deductions, and ordering tips, no signup needed.
Home & DecorSize your ceiling fan with our free calculator. Find the right blade span and downrod length for your room size and ceiling height.
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Home & DecorCalculate your LED savings free. See yearly savings, payback period, and 10-year totals when you switch to energy-saving bulbs.
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Home & DecorFind how many lumens each room needs with our free lighting calculator. Room-by-room brightness guide with fixture tips, no signup.
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Home & DecorRemove any stain with our free step-by-step guide. Search by stain type and fabric, plus what-not-to-do warnings that save clothes.
Home & DecorFind your ideal TV viewing distance free with SMPTE and THX rules. See your recommended range in feet and inches for any screen size.
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Home & DecorAdd solid borders, elegant frames, or polaroid-style captions to any photo. Custom colors and widths, instant preview, free download.
Image ToolsAdd custom text to any image with your choice of font, size, color, and style. Drag to position, add outlines, download as PNG. 100% free, in-browser.
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LifestyleTrack any 100-day challenge with a live day counter, end date calculator, and progress milestones. Free, no signup. Works for fitness, habits, and money goals.
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LifestyleCalculate Bill James Game Score for any pitching start. Enter IP, hits, runs, walks, and strikeouts for an instant 0-114 score.
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LifestyleCalculate baseball ERA from earned runs and innings pitched. Learn the formula, partial innings, and what ERA benchmarks mean. Free.
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LifestyleCompute basketball effective field goal percentage (eFG%) from makes, threes, and attempts. See how three point shooting changes scoring efficiency.
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LifestyleCalculate baseball fielding percentage from putouts, assists, and errors. Includes positional benchmarks from catcher to outfield.
LifestyleEstimate fish weight from length and girth measurements. Covers bass, pike, walleye, catfish and more with body-type formulas.
LifestyleConvert your reel's rated line capacity to any line diameter. Enter the factory rating and both diameters to see exactly how many yards of new line will fit.
LifestyleEstimate cosmic radiation dose from air travel by flight hours and altitude. Compare to background radiation and medical scans. Free, no signup.
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LifestyleCalculate hockey save percentage (SV%) from saves and shots faced, or from goals allowed. See how your number stacks up against NHL starter benchmarks.
LifestyleCalculate a hockey goalie's goals against average (GAA) from goals allowed and minutes played. Compare your number against NHL starter benchmarks.
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LifestyleHow much sunscreen you need per person per day: full-body ounces, face amount, and bottles for a trip. Based on AAD guidelines. Free, no signup.
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LifestyleWork out ICC T20 team ranking points after a match. Enter both teams' ratings and the result to see the points each side gains under official ICC rules.
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LifestyleConvert finger circumference in inches to US ring size, plus diameter, EU size, and UK letter. Free ring size calculator, no signup.
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LifestyleConvert jeans sizes between US, UK, and EU from your waist measurement. Covers men and women with waist and inseam guidance.
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LifestyleConvert your age to the Korean age system. Enter your birth date for Korean age, international age, and year age. Free, no signup.
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LifestyleChoose genres, mood, runtime, and era, then get a random movie recommendation from a curated list of well-known films.
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LifestyleCalculate NFL passer rating from completions, attempts, yards, touchdowns, and interceptions using the official league formula.
LifestyleConvert nautical miles to statute miles, kilometers, yards, and feet. Exact international definition: 1 nmi = 1,852 meters.
LifestyleCalculate cricket Net Run Rate from runs scored, overs faced, runs conceded, and overs bowled. Handles cricket overs notation correctly.
LifestyleEnter a first name and pick a vibe (funny, cool, cute, tough) to get nickname ideas. Great for friends, teammates, and pets.
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LifestyleCalculate baseball OPS from hits, doubles, triples, homers, walks, and at-bats. Includes OBP and SLG breakdown with benchmarks.
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LifestyleCheck if any date is a palindrome in MMDDYYYY format, and find the next upcoming palindrome date automatically. Free and fun.
LifestyleConvert paper GSM to thickness and find stack height for any sheet count. Printer paper, cardstock, and reams explained.
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LifestyleCalculate fabric yardage and pleat counts for a pleated skirt. Knife pleats from waist, pleat size, and length. Free tool.
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LifestyleCalculate speedometer pulse per mile from tire diameter and axle ratio for speedometer recalibration. Free VSS calculator.
LifestyleEstimate punching force in newtons and pounds from effective mass, hand speed, and contact time. Compare with lab-measured pro values.
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LifestyleSee how much money you save quitting smoking, cigarettes avoided, and the health milestone timeline from day one. Free, no signup.
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LifestyleCannot decide? This random donut generator picks your donut from 30 classics, with calorie estimates from Dunkin and Krispy Kreme data.
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LifestyleConvert ring sizes between US, UK, EU, and Japanese systems. Enter diameter, circumference, or a known size. Free chart included.
LifestyleConvert finger circumference from cm or mm to US, UK, and EU ring sizes instantly. Includes diameter, measuring tips, and a size chart.
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LifestyleCalculate save percentage for goalies in hockey, soccer, and lacrosse. Enter saves and shots against for an instant SV%.
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LifestyleFind the correct shoelace length for any shoe: enter eyelet pairs for inches and cm. Sneaker, dress shoe, and boot lace chart.
LifestyleFind what one shower really costs in water plus heating energy, and what shorter showers or a low-flow head saves yearly. Free.
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LifestyleFind the right ski length from your height, weight, skill level, and terrain. Based on standard ski sizing charts for all-mountain skis.
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LifestyleCalculate baseball slugging percentage from singles, doubles, triples, homers and at-bats. Total bases per at-bat. Free.
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LifestyleConvert your US shoe size to the right sock size for men, women, and kids. Includes international shoe conversions. Free, no signup.
LifestyleCalculate your household sock disappearance rate and lifetime sock losses. A playful laundry statistics calculator online.
LifestyleFind the perfect sofa size for your room: width rules, clearance, seating capacity, and delivery fit. Free sofa size guide tool.
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LifestyleEnter your height to get the ideal sitting and standing desk heights plus monitor and chair setup. Free ergonomic calculator.
LifestylePlan a Star Wars marathon: total runtime for any movie lineup plus breaks. Saga, spinoffs, watch orders, and finish times.
LifestyleSubtract one time from another with hours, minutes, and seconds. Free time difference calculator with borrowing handled. No signup.
LifestyleFind flattering sunglasses for your face shape, decode frame size numbers, and learn what UV protection really means. Free.
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LifestylePlan your next binge: total series runtime from seasons, episodes, and length, plus days to finish and end date. Free calculator.
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LifestyleEstimate how many tennis balls you need per month from playing hours. Based on real pressurized ball lifespan on court.
LifestyleFind the right tent size for your group: capacity ratings, floor dimensions, and space per person. Free tent size guide.
LifestyleEstimate Tesla charging cost from battery size, charge levels, and electricity rate. Model 3, Y, and Cybertruck presets. Free calculator.
LifestylePlan Thanksgiving dinner for any guest count: turkey size, potatoes, stuffing, gravy, rolls, and pie amounts in one list.
LifestylePlan a Witcher marathon: total runtime for all seasons, Blood Origin, and the animated film, with breaks and finish time. Free planner.
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LifestyleEnter your daily TikTok hours to see what that time could build in a year: books read, skills learned, miles run. Free tool.
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LifestyleEstimate how import tariffs affect toilet paper prices. Enter packs, price, and tariff rate for the yearly extra cost. Free estimator.
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LifestyleConvert US shoe sizes to EU, UK, and foot length in cm. Separate men and women charts with a measuring guide. Free tool.
LifestyleConvert between US and UK shoe sizes for men and women. Enter a size in either system for the instant equivalent. Free, no signup.
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LifestyleCompare two products by unit price to find the real bargain, with per-unit savings shown clearly in dollars and cents. Free.
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LifestyleEstimate a baseball player WAR from batting, baserunning, fielding, and position. A simplified, transparent version of the famous stat.
LifestyleCalculate WHIP for any pitcher from walks, hits, and innings pitched. Includes benchmarks and WHIP vs ERA comparison.
LifestyleCalculate wedding bar quantities: wine bottles, beer, liquor, and champagne toasts for your guest count and reception length.
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LifestyleFind the ISO week number for any date. Shows the week year, week start and end dates, and the weekday. Free and instant.
LifestyleFind your ideal weighted blanket weight with the 10 percent rule: enter body weight for blanket weight, size, and safety guidance.
LifestyleCalculate gallons of water stored in your well casing from diameter, depth, and static water level. Free well volume calculator.
LifestyleWatch the world in real time: births, Google searches, and more, ticking every second. Fascinating live counters with real estimates.
LifestyleConvert crank horsepower to wheel horsepower using drivetrain loss figures for AWD, RWD, and FWD cars and trucks alike. Free.
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LifestyleFind the right windsurfing sail size from your weight and wind speed. Based on standard sail selection charts for all riders.
LifestyleCalculate team winning percentage from wins and losses, plus games behind in the standings. For baseball and any sport. Free.
LifestyleConvert Galleons, Sickles, and Knuts between each other and into dollars, using the canon exchange rates from the books. Free.
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LifestyleCount business days between two dates, skipping weekends and US federal holidays. Includes total days and calendar breakdown.
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LifestyleEstimate calories burned watching the World Cup from matches watched and your weight. Includes extra time and penalty shootouts.
LifestyleCount exact years, months, and days between any two dates. Ideal for computing age, anniversaries, and work tenure. Free tool.
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LifestyleGenerate catchy YouTube channel name ideas based on niche and style. Built for aspiring creators in gaming, vlogs, tech, cooking, and fitness.
LifestyleCalculate area and perimeter of circles, squares, rectangles, triangles, trapezoids, parallelograms, and ellipses. All formulas shown.
MathDo arithmetic directly in binary with bitwise AND, OR, and XOR. See binary working alongside decimal equivalents.
MathCompute derivatives of polynomial, trigonometric, exponential, and logarithmic functions with each differentiation rule shown.
MathCalculate powers, square roots, nth roots, and logarithms. Shows step-by-step work for exponent rules, negative exponents, and fractional exponents.
MathFind exactly what score you need on your final exam to get the grade you want. Reverse-solve any weighted course in seconds. Free, no signup.
MathAdd, subtract, multiply, and divide fractions with step-by-step solutions. Automatically simplifies results and converts to mixed numbers and decimals.
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MathCalculate the LCM (Least Common Multiple) and GCD (Greatest Common Divisor) of two or more numbers. Shows step-by-step solutions.
MathDivide large numbers with every step of long division shown: divide, multiply, subtract, bring down. Perfect for homework checks.
MathAdd, subtract, and multiply matrices, compute determinants and inverses, with each step shown. Supports 2x2 and 3x3 matrices.
MathDo arithmetic with mixed numbers and fractions. Converts to improper fractions, shows every step, and simplifies the result.
MathConvert numbers between binary (base 2), octal (base 8), decimal (base 10), hexadecimal (base 16), and any custom base up to 36.
MathCalculate percentages easily: what is X% of Y, X is what % of Y, percentage increase/decrease, and percentage difference. Fast and free.
MathCompute permutations (nPr) and combinations (nCr) with the formula, factorial expansion, and plain-English explanation of when order matters.
MathFind the prime factorization of any number. Shows factor tree, exponential form, all divisors, and checks if a number is prime.
MathCalculate the hypotenuse or missing leg of a right triangle using the Pythagorean theorem (a² + b² = c²). Also checks if three lengths form a right triangle.
MathSolve quadratic equations using the quadratic formula. Shows real and complex roots, vertex, axis of symmetry, and step-by-step work.
MathGenerate random integers between any min and max. No-duplicate mode, sorting, and quantity control for fair draws and math experiments.
MathSimplify ratios, solve proportions for missing values, scale ratios up/down, and convert ratios to percentages and fractions.
MathSolve right triangles with the Pythagorean theorem: find any missing side, plus angles, area, and perimeter. Shows every step.
MathRound numbers to decimal places or significant figures, with round-half-up, bankers rounding, floor, and ceiling modes explained.
MathFree online scientific calculator: trig, logs, powers, roots, factorials, constants. Degree/radian modes, keyboard support.
MathConvert numbers to and from scientific notation. Add, subtract, multiply, and divide numbers in scientific notation with step-by-step work.
MathEnter two points to get slope, distance, midpoint, and the line equation, with every formula step shown.
MathCalculate mean, median, mode, range, variance, standard deviation, and quartiles from a dataset. Shows full descriptive statistics with step-by-step work.
MathSolve two linear equations in two unknowns by substitution and elimination. Shows every step and detects no-solution and infinite-solution cases.
MathEnter any three known values (sides and angles) to solve a general triangle with the Law of Sines and Law of Cosines. Full steps shown.
MathBuild truth tables for AND, OR, NOT, XOR, NAND, NOR, XNOR, and implication. See every input combination with plain-English explanations.
MathCalculate the volume of 8 common 3D shapes with the formula shown for each. Switch between metric and imperial units.
MathConvert BPM to delay times (ms), calculate song duration from beat count and tempo, and find tap tempo BPM. Essential for musicians, producers, and DJs.
MusicEnter your chord progression and capo position to see the exact shapes to play, or transpose to find the capo fret that fits your voice. Free.
MusicIdentify a chord from its notes or build any chord from a root. Shows notes, intervals, and inversions for major, minor, 7th, diminished, augmented chords.
MusicGenerate chord progressions in any key by mood: happy, sad, epic, or jazzy. Get chords, roman numerals, and notes for songwriting inspiration.
MusicPaste any chord chart and transpose it up or down by semitones. Preserves chord qualities, slash chords, sharps and flats automatically.
MusicClick any key on the circle of fifths to see its key signature, relative minor, scale notes, and diatonic chords. Play scales with built-in audio.
MusicConvert BPM to delay times in ms for quarter, eighth, dotted, triplet, and sixteenth subdivisions. Essential for synced delays and reverb pre-delay.
MusicEnter any key to see all seven diatonic chords with roman numerals, notes, and chord qualities. Works for major and minor keys.
MusicConvert any frequency in Hz to its nearest musical note. Shows note name, octave, cents deviation, and 12-tone equal temperament frequency.
MusicLearn every note on the fretboard with a scored quiz. Random notes light up, you identify them, and track your score and streak. Free trainer.
MusicFind the interval between any two musical notes. Shows interval name, quality (major/minor/perfect), number of semitones, and frequency ratio.
MusicTrain your musical ear with an interactive interval quiz. Hear random intervals, guess the answer, and track your score across three levels.
MusicConvert chord progressions into Nashville Number System notation and transpose to any key instantly. Enter chords, get the number chart, see the new key.
MusicConvert any musical note and octave to its exact frequency in Hz. Supports all 12 notes across 9 octaves with custom concert pitch (A4 tuning) settings.
MusicFree online drum machine with synthesized kick, snare, clap, and hi-hats. Build 16-step patterns, adjust tempo and swing, no downloads needed.
MusicFree online metronome with gradual tempo increase (warmup mode). Set your BPM, time signature, and accent pattern. Uses Web Audio API for precise timing.
MusicGenerate the notes for any major, minor, modal, pentatonic, blues, or other scale. Shows all scale notes, intervals, and relative key information.
MusicPlan a live setlist with song durations, set breaks, and buffer time. Get the total runtime, start and end times, and a minute-by-minute schedule you can copy.
MusicEnter the chords of any song and find its most likely key. Scores all 12 major and 12 minor keys by how many chords fit, with a ranked confidence list.
MusicTap along with any beat to measure its tempo in BPM. Uses a rolling average of your taps with a stability readout, plus keyboard support via the spacebar.
MusicCompare note frequencies across tuning systems: 12-TET, just intonation, Pythagorean, and meantone. Calculate cent deviations between temperaments.
MusicUse your microphone to find the lowest and highest notes you can sing. See your range in notes and semitones, and find your voice type, soprano to bass.
MusicInsert blank pages at any position in a PDF: after specific pages, at the start or end, or pad to an even count for booklet printing. Free.
PDF ToolsAdd custom header and footer text to every page of a PDF: document titles, dates, and automatic page numbers. Runs entirely in your browser, no uploads.
PDF ToolsStamp "Page X of Y" numbering at any position on your PDF, with font, size and start number options. Free, private, runs in your browser.
PDF ToolsReorder PDF pages into booklet signatures and impose 2-up so the document prints as a foldable booklet. Free, private, runs in your browser.
PDF ToolsUpload two PDFs and compare them side by side with a draggable visual slider, plus a line-by-line text diff. All in your browser. Free.
PDF ToolsShrink PDF file size with light optimization: object-stream recompression and metadata stripping. 100% private, in-browser. Free.
PDF ToolsTrim margins off PDF pages visually or numerically by setting the crop box. Apply to all pages or a page range. Runs in your browser; files never upload.
PDF ToolsDelete unwanted pages from a PDF with a visual thumbnail picker. Click pages to remove, then save the rest as a new PDF. Free.
PDF ToolsStraighten slightly rotated scanned PDF pages with manual rotation control and live preview. Free, private, runs in your browser.
PDF ToolsPull every embedded JPEG photo out of a PDF and download the images as a ZIP. Extraction runs in your browser, nothing uploads. Free.
PDF ToolsPull specific pages out of a PDF into a brand-new file. Type ranges like 3, 7-9 and download the extracted pages. Private, free.
PDF ToolsFill interactive PDF form fields (text, checkboxes, dropdowns, radio buttons) in your browser, then save or flatten the form. No uploads, no signup.
PDF ToolsConvert PDF pages to images so annotations, form fields and layers become permanent and uneditable. Free, private, runs in your browser.
PDF ToolsConvert a color PDF to black-and-white for cheap printing. Pages are rasterized and rebuilt as a grayscale PDF. Private, in-browser. Free.
PDF ToolsTurn JPG and PNG images into a PDF, one image per page, with page-size and fit options. Drag to reorder. Everything runs in your browser; nothing uploads.
PDF ToolsCombine multiple PDF files into one document right in your browser. Choose page ranges, drag to reorder, and download the merged PDF. Free.
PDF ToolsImpose 2, 4, 6, 9 or 16 PDF pages onto a single sheet for handouts, booklets and saving paper. Free, private, runs in your browser.
PDF ToolsRun OCR on scanned PDFs right in your browser and extract text into a downloadable file. Your PDF never uploads anywhere. Free.
PDF ToolsInstantly inspect any PDF: page count, file size, PDF version, page dimensions, form fields, and encryption status. Runs in your browser, no uploads.
PDF ToolsView and edit PDF metadata: title, author, subject, keywords, creator, and creation date. Runs entirely in your browser, no uploads.
PDF ToolsTurn a PDF into a clean, readable HTML file you can open in any browser. Text is rebuilt into paragraphs in your browser. Free, private.
PDF ToolsConvert every page of a PDF into JPG or PNG images right in your browser. Download pages singly or all at once as a ZIP. Free.
PDF ToolsConvert a PDF into Markdown with detected headings, lists, and paragraphs. Heuristic structure detection runs 100% in your browser; files never upload.
PDF ToolsExtract all text from a PDF into a clean, downloadable .txt file, page by page. Runs entirely in your browser; your document never uploads anywhere.
PDF ToolsDraw black boxes over sensitive regions of a PDF for visual sharing and printing. Note: underlying text is not removed. In-browser, free.
PDF ToolsRearrange PDF pages with drag-and-drop thumbnails, then export the reordered PDF. All processing happens in your browser; your files are never uploaded.
PDF ToolsAttempt to fix a corrupted PDF that will not open, with a clear log of every repair step tried. Works entirely in your browser. Free.
PDF ToolsScale PDF pages to standard paper sizes (A4, Letter, Legal) or a custom percentage. Content scales proportionally. In-browser, free.
PDF ToolsFlip the entire page order of a PDF so the last page comes first. One click, instant, and 100% private in-browser processing.
PDF ToolsRotate all or selected PDF pages by 90, 180, or 270 degrees clockwise or counterclockwise. Runs entirely in your browser; files are never uploaded.
PDF ToolsDraw a signature with your mouse or finger, or upload a signature image, then place and resize it on any PDF page. In-browser, free.
PDF ToolsSplit a PDF by page ranges, into chunks of N pages, or into single-page PDFs as a ZIP. All in your browser, nothing uploads. Free.
PDF ToolsAdd a diagonal text watermark like CONFIDENTIAL or DRAFT, or an image watermark with opacity control. Free, private, runs in your browser.
PDF ToolsCalculate f-number from lens focal length and entrance pupil diameter. Convert between f-stops and T-stops to find actual light transmission. Free.
PhotographyEnter your image dimensions and a target aspect ratio to get exact crop dimensions in pixels. Presets for Instagram, YouTube, and print. Free.
PhotographyApply the 500 rule and the more accurate NPF rule to find the max shutter speed without star trails for your focal length and camera. Free.
PhotographyEnter aperture, focal length, subject and background distance to estimate background blur with a creamy-to-subtle rating. Free, instant.
PhotographyFind morning and evening blue hour windows for any date and latitude. Uses a simplified solar calculation: pick a preset city or enter custom coordinates.
PhotographyCalculate the circle of confusion (CoC) for any camera sensor size, viewing distance, and print size. Essential for accurate depth of field calculations.
PhotographyCalculate depth of field, hyperfocal distance, near/far focus limits, and background blur (bokeh) for any camera, lens, and aperture combination.
PhotographyGenerate printable depth of field tables for any camera and lens: hyperfocal distance, near and far limits, formatted for print. Free.
PhotographyLock in an exposure value and see every equivalent aperture, shutter speed, and ISO combination. Instant EV math in your browser. Free.
PhotographyCalculate equivalent camera exposures by adjusting aperture, shutter speed, and ISO. Find the correct EV (Exposure Value) for any lighting condition.
PhotographyDarkroom timer for black and white film developing with agitation interval beeps and presets for HP5+, Tri-X, and FP4+. Free.
PhotographyEnter your flash guide number, ISO, and distance to find the correct aperture for perfect flash exposure, or solve for distance instead. Free.
PhotographyCalculate focal length from subject size and distance, find image magnification and sensor coverage. Free tool for photographers.
PhotographyConvert focal lengths between sensor sizes. Get the full-frame equivalent, crop factor, and field of view for any lens. Free, instant results.
PhotographyCalculate how many focus steps and what step size you need for razor-sharp macro and product photos, front to back. Free, instant.
PhotographyCalculate golden hour, blue hour, sunrise, and sunset times for any location and date. Find the perfect time for outdoor photography.
PhotographyCalculate hyperfocal distance for any lens and aperture. Focus at the hyperfocal distance for maximum depth of field to infinity. Free.
PhotographyEstimate image noise (SNR) for different ISO settings. Find the cleanest ISO for your camera and learn the ISO versus noise tradeoffs. Free.
PhotographyFree count-up and count-down timer for long exposure and bulb mode photography, with an audio beep when time is up. Works offline.
PhotographyCalculate magnification ratio for macro photography. Find subject size, working distance, and extension tube settings for any lens and camera.
PhotographyCalculate the correct exposure time when using ND filters. Find the required shutter speed for any ND filter strength from ND2 to ND100000.
PhotographyPlan a panorama before you shoot: get the exact frame count with proper overlap for your focal length and sensor, plus multi-row coverage. Free.
PhotographyEstimate RAW and JPEG file sizes from your camera's megapixels, see how many shots fit on a memory card, and plan your shoot. Free.
PhotographyEnter your camera's megapixels to see the largest high-quality print size at 300, 240, and 150 DPI, plus real DPI of frame sizes. Free.
PhotographyComplete shutter speed chart with recommended settings for different subjects. Calculate the minimum shutter speed to freeze motion or create motion blur.
PhotographyPlan a time-lapse: enter shooting duration and target clip length to get the exact interval, total frames, and storage needed. Free.
PhotographyCalculate angular momentum for rotating systems from moment of inertia and angular velocity. Enter both values for instant results. Free, no signup.
PhysicsCalculate centripetal force for circular motion: Fc = mv²/r. Enter mass, velocity, and radius for instant results. Free, no signup.
PhysicsCalculate the electrostatic force between two point charges with Coulomb's law. Supports micro, nano, and picocoulomb units. Free.
PhysicsCalculate density, mass, or volume with ρ = m/V. Includes a reference table of common material densities from air to gold.
PhysicsCalculate the observed frequency when the source, observer, or both are moving. Explains redshift vs blueshift with sound and light presets.
PhysicsCalculate escape velocity for any planet, moon, or custom body with v = sqrt(2GM/R). Includes presets for all eight planets, the Moon, and the Sun.
PhysicsCalculate free fall time and final velocity from drop height. Enter height to see fall time and impact speed instantly. Free, no signup.
PhysicsSolve the wave equation v = fλ for frequency, wavelength, or wave speed, including period. Covers the full EM spectrum with band labels.
PhysicsCalculate the gravitational attraction between any two masses with F = Gm₁m₂/r². Includes presets for Earth, Moon, Sun, and planets.
PhysicsCalculate remaining quantity, elapsed time, or half-life for radioactive decay with N = N₀(1/2)^(t/t½). Includes isotope presets.
PhysicsSolve kinematic SUVAT equations for velocity, acceleration, time, or distance. Enter any three variables for instant results. Free, no signup.
PhysicsCalculate kinetic energy from mass and velocity: KE = ½mv². Enter mass and speed for instant energy results. Free, no signup.
PhysicsCalculate magnetic force F = qvB on a charged particle in a magnetic field. Enter charge, velocity, and field strength. Free, no signup.
PhysicsCalculate moment of inertia for common shapes: solid disk, hollow cylinder, sphere, rod, and plate. Essential for rotational dynamics. Free.
PhysicsCalculate moment of inertia I = ½mr² for a solid disk or cylinder. Enter mass and radius for instant results. Free, no signup.
PhysicsCalculate moment of inertia I = mL²/12 for a thin rod rotating about its center. Enter mass and length. Free, no signup.
PhysicsCalculate momentum, mass, or velocity with p = mv. Full metric and imperial unit support, plus a kinetic energy bonus readout. Free.
PhysicsSolve F = ma for force, mass, or acceleration with metric and imperial unit conversion. Includes weight and g-force readouts.
PhysicsSolve Ohm's law V = IR for voltage, current, or resistance. Enter any two values, plus power calculation. Free, no signup.
PhysicsCalculate the capacitance of a parallel plate capacitor from plate area and separation. Enter values for instant results. Free, no signup.
PhysicsCalculate total resistance of resistors in parallel with 1/Rt = 1/R1 + 1/R2. Enter values for instant results. Free, no signup.
PhysicsCalculate photon energy, electron kinetic energy, or threshold frequency with E = hf − φ. Includes work functions for common metals.
PhysicsCalculate gravitational potential energy PE = mgh from mass, gravity, and height. Enter values for instant results. Free, no signup.
PhysicsCalculate power from work/time, force/velocity, or voltage/current. Converts watts, horsepower, and BTU/hr with any-variable solving.
PhysicsCalculate pressure from force and area with P = F/A. Converts Pa, psi, atm, bar, mmHg, and more units. Free, instant results.
PhysicsCalculate projectile range, maximum height, and time of flight from initial velocity and launch angle. Instant results. Free, no signup.
PhysicsCalculate rotational kinetic energy for spinning objects: KE = 1/2 x I x omega². Enter moment of inertia and angular velocity. Free, no signup.
PhysicsCalculate total resistance of resistors in series with Rt = R1 + R2 + ... Enter values for instant results. Free, no signup.
PhysicsCalculate pendulum period, frequency, or length with T = 2π√(L/g). Adjustable gravity for the Moon, Mars, and other planets.
PhysicsCalculate refraction angles or refractive indices with n₁sinθ₁ = n₂sinθ₂. Built-in index table for glass, water, diamond, and air.
PhysicsCalculate sound intensity level in decibels: dB = 10·log(I/I0). Enter the intensity ratio for instant results. Free, no signup.
PhysicsCalculate heat energy, mass, specific heat, or temperature change with Q = mcΔT. Includes a table of specific heats for common substances.
PhysicsCalculate spring force F = -kx with Hooke's law. Enter spring constant and displacement for instant results. Free, no signup.
PhysicsCalculate torque from force, lever arm, and angle: T = F x r x sin(angle). Enter values for instant newton-meter results. Free, no signup.
PhysicsCalculate wave speed from frequency and wavelength: v = f x wavelength. Enter any two values for instant results. Free, no signup.
PhysicsCalculate work done by a force: W = F x d x cos(angle). Enter force, distance, and angle for instant results. Free, no signup.
PhysicsBuild correct Apache .htaccess redirect rules: 301 vs 302, www vs non-www, HTTP to HTTPS, and old path to new path. No regex memorization.
SEO ToolsGenerate valid Article, NewsArticle, and BlogPosting JSON-LD schema from headline, author, date, and image. Copy-paste ready for rich results.
SEO ToolsTest email subject lines before you send. Checks length, spam trigger words, and mobile truncation so more emails get opened. Free.
SEO ToolsGenerate valid FAQPage JSON-LD schema in seconds. Add your questions and answers, copy the code, paste into your page. Free, no signup.
SEO ToolsTurn a Google Place ID into a short direct link that sends customers straight to your review form. Free, instant, no signup.
SEO ToolsPreview how your page looks in Google search results. Check title and meta description length with pixel accuracy for desktop and mobile. Free.
SEO ToolsPaste page HTML to visualize the H1-H6 outline. Flags skipped levels, multiple H1s, empty headings, and thin heading text.
SEO ToolsScore any headline for clicks. Checks length, power words, emotional pull and numbers, then shows how to improve it. Free, no signup.
SEO ToolsTurn step-by-step instructions into valid HowTo JSON-LD with steps, tools, materials, total time, and cost. Copy-paste ready.
SEO ToolsPaste page HTML to audit every image: missing alt text, empty alt, stuffed keywords, and file-name-as-alt problems. Free, instant.
SEO ToolsPaste any JSON-LD block to validate syntax and check required fields for Article, Product, FAQ, LocalBusiness, and HowTo schema.
SEO ToolsAnalyze any text for keyword frequency, spot stuffing risks and track your target keyword density. Paste text, instant results. Free, no signup.
SEO ToolsCombine seed keywords with prefixes, suffixes, and modifiers to generate hundreds of long-tail keyword ideas, ready to copy.
SEO ToolsGenerate valid LocalBusiness JSON-LD from name, address, phone, hours, and geo coordinates. Built for local pack eligibility.
SEO ToolsFill in title, description, robots, and canonical to generate a complete block of SEO meta tags ready to paste into any page head.
SEO ToolsPaste article text plus a target keyword for an actionable checklist score: keyword placement, headings, density, length, and readability.
SEO ToolsPreview how your link looks when shared on Facebook, X and LinkedIn. Check your title, description and image before you publish. Free, no signup.
SEO ToolsBuild Open Graph and Twitter Card meta tags from a form. Preview-ready tags for Facebook, X, LinkedIn, and Slack unfurls.
SEO ToolsCreate Product JSON-LD with price, availability, brand, and aggregate rating markup for rich product results. Free, copy-paste ready.
SEO ToolsScore your writing with Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog and SMOG. See exactly which sentences to fix. Free, no signup.
SEO ToolsBuild valid robots.txt rules with allow and disallow paths, sitemap location, and crawl delay. Download the finished file. Free.
SEO ToolsPaste any robots.txt and test URLs against it. See exactly which pages Googlebot can crawl, with rule-by-rule explanations. Free, no signup.
SEO ToolsTurn any title into a clean URL slug. Lowercase, stop-word removal, and custom separators, with live preview. Free, no signup.
SEO ToolsBuild perfectly tagged campaign URLs for Google Analytics. Validation, naming tips and bulk mode included. Free, no signup.
SEO ToolsPaste page URLs with optional priority and change frequency to generate a valid XML sitemap file for download. Free, instant.
SEO ToolsPaste your XML sitemap and validate it instantly. Counts URLs, checks required tags, and flags errors before you submit to Google. Free, no signup.
SEO ToolsRemove zero-width spaces, hidden Unicode, smart quote issues, and markdown leftovers from ChatGPT and AI-generated text.
Text ProcessingEstimate how many tokens your text uses in GPT, Claude, and Gemini models, with cost estimates and context window warnings.
Text ProcessingAdd sequential line numbers to any text with customizable format, separator, and starting number. Remove numbers just as easily.
Text ProcessingConvert text to uppercase, lowercase, title case, sentence case, camelCase, snake_case, kebab-case, and more. Free online text case changer.
Text ProcessingConvert delimited text between CSV, TSV, pipe, and semicolon formats with smart quote handling and delimiter auto-detect.
Text ProcessingRemove duplicate lines from text, sort lines, trim whitespace, and filter empty lines. Free online tool for cleaning up lists and data.
Text ProcessingFind accidentally repeated words within sentences, like the the typo. Each duplicate is listed with its exact position. Free proofreading tool.
Text ProcessingPaste any text to extract every email and URL into clean, deduplicated lists. Copy with one click or download as CSV. Free email and link extractor.
Text ProcessingTurn plain text into dozens of Unicode stylish variants: bold, italic, script, circled, and more. One-click copy for social bios.
Text ProcessingFind and replace across pasted text with plain-text or regex mode, case sensitivity, whole-word matching, and live replacement counts.
Text ProcessingGenerate Lorem Ipsum placeholder text for your design mockups and prototypes. Choose paragraphs, sentences, or words. Customize length and format.
Text ProcessingConvert text to Morse code and decode Morse back to text instantly. Play the encoded message as audio in your browser. Free Morse code translator.
Text ProcessingRemove unwanted line breaks from text copied from PDFs and terminals, preserving real paragraph breaks or stripping all breaks.
Text ProcessingSort lines alphabetically A-Z or Z-A, numerically, by length, or randomly shuffle, with options to ignore case and remove empties.
Text ProcessingPaste HTML markup and strip every tag to leave clean plain text. Keep line breaks and decode HTML entities automatically. Free HTML tag remover online.
Text ProcessingCompare two texts side by side and highlight differences. Find added, removed, and changed lines. Free online text comparison and diff tool.
Text ProcessingReverse characters in text, reverse word order, flip lines, or create mirror text. Free online text reversal tool with multiple reverse modes.
Text ProcessingConvert any text to binary code and decode binary back to text instantly. Choose 7 or 8 bit encoding, spaced output, or hex mode. Free binary translator.
Text ProcessingListen to any pasted text read aloud with your browser's built-in speech synthesis. Pick the voice, adjust rate and pitch. Free text to speech reader.
Text ProcessingClean up messy text by removing extra spaces, tabs, blank lines, leading/trailing whitespace. Format pasted text from PDFs and documents.
Text ProcessingCount words, characters, sentences, and paragraphs in your text. See reading time, speaking time, and keyword density instantly. Free online word counter.
Text ProcessingCalculate your exact age in years, months, days, hours, minutes, and seconds. Find the next birthday countdown and age milestones.
Time & ScheduleSee exactly how long until your next birthday: days, hours, minutes, seconds, plus what age you turn and the day of the week.
Time & ScheduleCalculate business days between two dates skipping weekends and US federal holidays, or add N business days to find a deadline.
Time & ScheduleFree online countdown timer and stopwatch. Set custom countdowns to any date, run a stopwatch with laps, and get audio alerts when done.
Time & ScheduleAdd or subtract days, weeks, months, or years from any date. See the resulting date and day of the week with month-end handling.
Time & ScheduleCalculate the exact number of days, weeks, months, or years between two dates. Find working days, weekends, and business days between any two dates.
Time & ScheduleEnter any date, past or future, to discover its day of the week instantly. Includes a mini calendar of the month for context. Free weekday finder.
Time & ScheduleEnter your birth date to see exactly how many days, hours, minutes, and seconds you have lived. Spot milestones like your 10,000th day. Free calculator.
Time & ScheduleEnter your birth year to discover your generation, from Gen Alpha to the Silent Generation. See year ranges, traits, and fun facts for each cohort. Free.
Time & ScheduleLive ticking countdowns to major US holidays: Christmas, New Year, Thanksgiving, July 4th, Halloween, Easter, and more. Days, hours, minutes, and seconds.
Time & ScheduleCustomizable HIIT and Tabata interval timer with work/rest rounds, warmup, cooldown, audio beeps, and a visual progress ring.
Time & SchedulePick time zones and see overlapping business hours on a 24 hour grid. Find a meeting time that works for everyone, anywhere. Free planner.
Time & ScheduleConvert between 12-hour AM/PM time and 24-hour military time instantly, with a full reference chart and bulk conversion.
Time & ScheduleSet a free online alarm for any time with custom sounds, snooze, and a loud full-screen alert. Works right in your browser tab, no download needed.
Time & ScheduleAdd or subtract time durations, or find elapsed time between two clock times. Deduct breaks to track work hours. Free time duration calculator.
Time & ScheduleConvert time between any two time zones instantly. See current time in multiple cities worldwide. Daylight saving time aware.
Time & ScheduleConvert Unix timestamps to human-readable dates, or convert any date/time to a Unix timestamp (epoch time). Supports milliseconds and seconds.
Time & ScheduleEnter any date to get its ISO week number, or enter a year and week to see the exact date range. Includes a full year table.
Time & ScheduleSee live time in major world cities side by side with day and night indicators. Ticks every second, right in your browser. Free world clock online.
Time & ScheduleEnter your birth date to reveal your Western zodiac sign with traits and element, plus your Chinese zodiac animal and its meaning. Free star sign finder.
Time & ScheduleCalculate ABV from original and final gravity readings. Get alcohol by volume, apparent attenuation, and calorie estimates for beer, wine, and mead.
Convert any oven recipe to air fryer time and temperature. Drop 25°F and 20% of the time with one click. Works in Fahrenheit and Celsius.
Find the right grill size for your crowd. Enter guests to get the cooking area you need in square inches, plus burner and grill type guidance.
Calculate exact salt, Prague Powder #1, and sugar for dry-curing bacon at home. Food-safe ratios by meat weight with cure times and safety tips.
Convert any bread recipe to baker's percentages instantly. Enter flour and ingredient weights to get hydration, salt, and yeast percentages. Free, no signup.
Find common baking substitutions for buttermilk, eggs, butter, flour, sugar, and more. Quick reference guide for when you're missing an ingredient.
Calculate bread hydration percentage and baker's percentages for any bread recipe. Find the right flour-to-water ratio for your dough.
Calculate sandwich spreads for any crowd: butter, cream cheese, jam, mayo, peanut butter. Enter sandwiches, get exact amounts.
No accounts. No paywalls. No data leaving your device.
All calculations happen in your browser, no server round trips, no loading spinners.
Your data never leaves your device. No accounts, no tracking.
Every tool works on phones, tablets, and desktops.
The service worker caches tools so they keep working without internet.
Fresh calculators ship every week across finance, health, SEO, and more.
No freemium limits. No sign-ups. No credit cards, ever.
