Free Percentage Calculator
X% of Y, percentage change, and more.
What is X% of Y?
X%% of
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Result
X is what percent of Y?
of
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Result
Percentage change
→
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Change
All results update as you type.
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How to use the Percentage Calculator
- 1Pick the question type.
- 2Enter the values.
- 3Read the result — all modes update live.
Features
- 3 calculation modes
- Live results
- Copy result
Frequently Asked Questions
How do I calculate percentage change?
(new − old) / old × 100. Negative results mean a decrease.
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About the Percentage Calculator
All common percentage questions: what is X% of Y, X is what % of Y, and percentage increase/decrease. The Percentage Calculator runs entirely in your browser — your data is processed locally and never uploaded to a server. Explore more Calculators tools or browse all free online tools.