Five everyday percentage questions in one place: a percent of a number, what percent one number is of another, the change between two numbers, and adding or taking a percent off.
loading toolHow to use the percentage calculator
- Type your numbers in the boxes (pick your currency or units if asked).
- The answer updates as you type: no button to press.
- Copy the result, or share it on WhatsApp with one tap.
Questions
How do I work out a percentage of a number?
Multiply the number by the percent and divide by 100. 15% of 200 is 200 × 15 ÷ 100 = 30.
How is percentage change worked out?
Subtract the old value from the new one, divide by the old value and multiply by 100. From 80 to 100 is a 25% increase.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
