Toolybird Blog
Practical guides from the Toolybird team: personal finance, money math, health basics, writing, and more. Clear explanations with real examples.
How to Calculate Your Retirement Number (and If You Are on Track)
Your retirement number is simpler than the finance world makes it sound. Learn the 25x rule, how to adjust for inflation, and how to check whether your savings are on track.
Read articleSales Tax by State: An Online Shopper's Guide
Sales tax rules change at every state line, and online shopping made them more confusing. Here is how sales tax works state by state and what to check before you buy.
Read articleImage Formats Compared: JPG vs PNG vs WebP
Picking the right image format can cut file sizes in half with no visible difference. See how JPG, PNG, and WebP compare and when to use each one.
Read articleUnderstanding Your Paycheck: Where Your Deductions Go
Federal tax, FICA, state tax, 401(k), health premiums. We break down every common paycheck deduction line by line so you know exactly where your money goes.
Read articleDebt Snowball vs Debt Avalanche: Which Gets You Free Faster
Two proven payoff strategies, one goal: zero debt. Compare the snowball and avalanche methods on real numbers so you can pick the plan you will actually finish.
Read articlePDF Compression Explained: Smaller Files, Same Quality
Large PDFs clog inboxes and fail uploads. Learn how PDF compression works, what actually shrinks the file, and how to keep quality high.
Read articleHow Many Words per Page? A Writer's Guide
Word counts and page counts are not interchangeable. This guide covers the standard words-per-page ranges for manuscripts, essays, and blog posts, plus the formatting that changes them.
Read articleBMI: What It Measures and What It Misses
BMI is a screening tool, not a diagnosis. Learn how the formula works, why it misreads muscular and older bodies, and which numbers to look at next.
Read articleThe Math Behind Compound Interest (and Growing Money)
Compound interest is the engine behind retirement savings. See the actual math, run the numbers yourself, and learn why starting early beats saving more later.
Read articleHow to Calculate Mortgage Payments by Hand
You do not need a spreadsheet to understand your mortgage. Walk through the amortization formula step by step and see how taxes, insurance, and PMI stack on top.
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