About Calcuroo
Calcuroo is a set of free online calculators for money, math, school and everyday life. No sign-up, no clutter, and the calculators show their working.
What Calcuroo is
Calcuroo gives quick, clear answers to everyday number questions: how savings grow with compound interest, what percentage one number is of another, your grade or GPA, your exact age, the number of days between two dates, and more.
- Free: every calculator is free to use. There is no account and no sign-up.
- No clutter: no sign-up pop-ups and no pages crowded with ads, just the calculator and its answer.
- Works on any device: phone, tablet or computer, in light or dark mode.
- Shows the steps: where it helps, you see the working as well as the answer.
Our mission
Calcuroo is an independent website with one goal: free, accurate calculators that are easy to use and show their working, so anyone can check the answer for themselves.
How we build and check our calculators
- Standard formulas. Our formulas come from standard maths and finance textbooks and other public sources, for example the formulas for compound interest, percentages, GPA scales and date maths.
- Tested before launch. Every calculator is tested with known example answers and with edge cases such as zero, negative numbers, very large numbers and leap years before it goes live.
- Exact where it matters. The maths runs in your browser and uses exact methods where they are needed, such as exact fractions and calendar-safe date maths. No rounding tricks.
- Steps you can check. We show the steps so you can check the answer yourself.
- Mistakes get fixed. Found a mistake? Email hello@calcuroo.net and we will fix it quickly.
Information, not advice
Results on Calcuroo are for information and education. They are not professional financial, tax or legal advice. For important decisions, please check with a qualified professional.