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Decide in minutes, not afternoons.

Fast, accurate calculators and converters for home, money, health, energy, travel, and the kitchen — measure, enter, and get a number you can trust.

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10 collections, 339 tools — pick a category to see everything in it.

Home Improvement

Plan the project before you swing the hammer — budgeting, financing, and material math without the spreadsheet.

21 calculators

Travel

Plan the trip before you book it — budgets, fuel, packing, and the small decisions that add up.

8 calculators

Cooking & Baking

Cups to grams for real ingredients, plus oven temperatures — weigh it right and bake it at the correct heat.

24 calculators

Health & Fitness

Calories, body metrics, hydration, protein, and training numbers — clear estimates for general guidance, never medical advice.

20 calculators

Electricity & Energy

Run-cost, appliance, and solar math in plain dollars — what a device costs, what a system makes, and your bill line by line.

36 calculators

Finance & Math

Percentages, tips, discounts, tax, markup, pay, and interest — the everyday money math, worked out clearly. General information, not financial advice.

28 calculators

Dates & Time

Exact ages, gaps between two dates, and working-day counts — calendar math that handles leap years and month lengths so you do not have to.

20 calculators

Math

Fractions, ratios, averages and the rest of school-and-spreadsheet arithmetic — each one showing the working, not just the answer.

26 calculators

Unit Converters

Fast, exact unit conversions — metric to imperial and back, each with the real factor and a one-tap swap.

139 calculators

Utilities

Everyday text and web tools — counting, generating, and encoding. Everything runs in your browser; nothing you type is uploaded.

17 calculators

A few of the most useful tools across the site to get you started.

Guides & how-tos

Practical answers with the math shown — every guide pairs with a free calculator.

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Utilities

How Many Pages Is 1,000 Words?

Two pages single-spaced, four double — every guide agrees, and every guide credits it to Times New Roman. The number is a typewriter measurement, and it can only ever overstate your page count.

September 6, 2026 · 7 min read

Health & Fitness

How Many Steps Are in a Mile? Not 2,000

Every page prints 2,000 steps to the mile. Run the step-length model backwards and that is the figure for someone six foot four — everyone shorter walks more, and pace moves it almost as much as height does.

September 6, 2026 · 8 min read

Math

The GPA Scale Is Not a National Standard

Every GPA page prints a 4.0 table as though it were fixed. Rice changed what an A+ is worth in 2018, and Memphis pays 3.84 for an A− — the scale is policy, set school by school.

September 4, 2026 · 7 min read

Dates & Time

Time and a Half: The Regular Rate Is Not Your Hourly Wage

Every explanation says multiply your hourly rate by 1.5. That is the wrong number the moment a bonus, a shift differential, or a second pay rate enters the week.

August 30, 2026 · 8 min read

Dates & Time

Federal Holidays: the Dates, and the Rules Behind Them

Eleven federal holidays — but not always eleven days off. The holiday keeps its statutory date; only the day off moves, and sometimes it moves into the next year.

August 28, 2026 · 8 min read

Dates & Time

How Many Working Days Are in a Year?

250 working days, 2,000 hours, exactly 50 five-day weeks. That tidy set of numbers is true this year and wrong next year, and the leap year is not the reason.

August 28, 2026 · 6 min read