Percentage Calculator
Three everyday percentage questions, answered as you type.
What is X% of Y?
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X is what % of Y?
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Percentage change
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How to use
- Pick the question you want answered — each box works on its own.
- Type the two numbers.
- The answer appears instantly as you type.
FAQ
How do I find a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 is 200 x 15 / 100 = 30.
How is percentage change calculated?
Subtract the old value from the new one, divide by the old value, and multiply by 100. A rise from 80 to 100 is (100 - 80) / 80 x 100 = +25%.
Is anything I type stored?
No. All three calculators run in your browser — your numbers are never saved or sent anywhere.