Percentage Calculator
What is X% of Y, percentage change, and percentage difference — all in one place.
What is X% of a number?
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X is what percent of Y?
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Percentage change from X to Y
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Three common percentage questions in one tool: what is X% of Y, what percent is X of Y, and percentage increase or decrease between two numbers.
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percentage by 100, then multiply by the number. For example, 20% of 50 is (20/100) × 50 = 10.
What is percentage change vs. percentage difference?
Percentage change (used here) compares a "before" and "after" value and can be positive (increase) or negative (decrease). It always uses the starting value as the base.