Time & Schedule Calculators
Free time tools for every need. All calculations happen in your browser. No signup, no tracking.
Age Calculator: Exact Age from Your Date of Birth
Calculate your exact age in years, months, days, hours, minutes, and seconds. Find the next birthday countdown and age milestones.
Birthday Countdown: Days Until Your Birthday
See exactly how long until your next birthday: days, hours, minutes, seconds, plus what age you turn and the day of the week.
Business Days Calculator: Workdays Between Dates
Calculate business days between two dates skipping weekends and US federal holidays, or add N business days to find a deadline.
Countdown Timer: Set Timer & Stopwatch Online
Free online countdown timer and stopwatch. Set custom countdowns to any date, run a stopwatch with laps, and get audio alerts when done.
Date Adder and Subtractor: Add Days to Any Date
Add or subtract days, weeks, months, or years from any date. See the resulting date and day of the week with month-end handling.
Date Difference Calculator: Days Between Dates
Calculate the exact number of days, weeks, months, or years between two dates. Find working days, weekends, and business days between any two dates.
Day of the Week Finder: What Day Was Any Date
Enter 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.
Days Alive Calculator: How Many Days Old Are You
Enter 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.
Generation Finder: Gen Z, Millennial, Gen X Test
Enter 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.
Holiday Countdown: Days Until Christmas and More
Live ticking countdowns to major US holidays: Christmas, New Year, Thanksgiving, July 4th, Halloween, Easter, and more. Days, hours, minutes, and seconds.
Interval Timer: HIIT and Tabata Workout Timer
Customizable HIIT and Tabata interval timer with work/rest rounds, warmup, cooldown, audio beeps, and a visual progress ring.
Meeting Planner: Find Overlap Across Time Zones
Pick time zones and see overlapping business hours on a 24 hour grid. Find a meeting time that works for everyone, anywhere. Free planner.
Military Time Converter: 24 Hour Clock Chart
Convert between 12-hour AM/PM time and 24-hour military time instantly, with a full reference chart and bulk conversion.
Online Alarm Clock: Free Alarm with Sound Online
Set 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 Duration Calculator: Add and Subtract Hours
Add or subtract time durations, or find elapsed time between two clock times. Deduct breaks to track work hours. Free time duration calculator.
Time Zone Converter: Convert Time Zones Online
Convert time between any two time zones instantly. See current time in multiple cities worldwide. Daylight saving time aware.
Unix Timestamp Converter: Epoch Time to Date Online
Convert Unix timestamps to human-readable dates, or convert any date/time to a Unix timestamp (epoch time). Supports milliseconds and seconds.
Week Number Calculator: ISO Week of Year Finder
Enter 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.
World Clock: Current Time in Major World Cities
See 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.
Zodiac Sign Finder: What Is My Star Sign
Enter 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.