Percentage Calculator
Work out percentages, percentage change, and "what percent of" in one place.
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What is X% of Y?
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X is what percent of Y?
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Percentage change from X to Y
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How to use
- Pick the type of percentage question you have.
- Fill in the two known values.
- The answer updates instantly as you type.
Frequently asked questions
How do I calculate percentage change?
Percentage change = (new − old) / |old| × 100. A positive result is an increase; a negative result is a decrease.
How do I find X% of a number?
Multiply the number by X and divide by 100. For example, 20% of 150 is 150 × 20 ÷ 100 = 30.
🔒 This tool runs entirely in your browser. Nothing you enter is uploaded, logged, or stored.
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