Everyday numbers, worked out in seconds.
Loan payments, discounts, BMI, your exact age, GPA and more. Type your numbers and the answer updates as you go. Each calculator comes with a plain-English guide to the math behind it.
- Free, no sign-up
- Works on any phone
- Your numbers stay on your device
Try it: what is X% of Y?
Pick a calculator
Grouped by what you're trying to figure out.
Money
- Loan EMI CalculatorMonthly payment, total interest and a yearly schedule for any loan.
- Compound Interest CalculatorHow savings grow over time, with optional monthly deposits.
- Discount CalculatorSale price after % off, including stacked "extra 10% off" deals.
- Sales Tax & VAT CalculatorAdd tax to a price, or take it out of a total that already includes it.
Health
Dates & time
Math & school
How our calculators work
The formula is always shown
Every calculator has a guide with the exact formula, a worked example you can check by hand, and the limits of the result. If you can't see how a number was made, you shouldn't have to trust it.
Nothing leaves your device
The math runs in your browser. We don't save, send or see the numbers you enter, so you can use real figures for a loan or your health.
Standard, cited methods
We use the formulas lenders, doctors and schools use: the standard amortization formula for loans, WHO categories for BMI, and the Mifflin-St Jeor equation for calories.