Percentage Calculator
Calculate percentages instantly with three different modes.
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What is X% of Y?
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X is what % of Y?
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Percentage Change from X to Y
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About the Percentage Calculator
This free percentage calculator handles the three most common percentage calculations. Find what a percentage of a number is, determine what percentage one number is of another, or calculate the percentage change between two values. All calculations happen instantly in your browser as you type. Perfect for homework, finance, shopping discounts, and everyday math.
How to Calculate Percentages
- X% of Y = (X / 100) * Y. For example, 15% of 200 = 30.
- X is what % of Y = (X / Y) * 100. For example, 25 is 12.5% of 200.
- % Change = ((New - Old) / |Old|) * 100. For example, from 50 to 75 is a 50% increase.