Percentage Calculator
Find X% of a number, what percent one number is of another, percent change, and percent difference — instantly, with the formula shown.
Runs in your browser
What is X% of Y?
%
Result
Answer
— Enter both numbers to see the result.
How to use
- Pick a calculation type: ‘X% of Y’, ‘X is what % of Y’, ‘% change’, ‘% difference’ or ‘Add / subtract %’.
- Fill both fields — for ‘% change’ put the old number in From and the new number in To.
- Press ‘Try an example’ to prefill the mode, or ⇄ Swap to exchange the two numbers.
- Read the answer and the formula under it, then use Copy for the number or Share link for the setup.
FAQ
How do I calculate X percent of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30.
How is percent change calculated?
Percent change = (new − old) ÷ |old| × 100. Going from 50 to 65 is (65 − 50) ÷ 50 × 100 = +30%.
What is the difference between percent change and percent difference?
Percent change compares a new value to an original value and has a direction. Percent difference compares two values symmetrically: |a − b| ÷ ((a + b) ÷ 2) × 100.
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