Math
Percentage Calculator
Calculate X% of Y, find what percent one number is of another, or compute percent change. Three modes in one free tool.
100
20% of 500
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Frequently Asked Questions
Quick answers to common questions
How do I calculate X% of Y?+
Multiply Y by X and divide by 100. Formula: Result = (X / 100) × Y. Example: 20% of 500 = 100.
How do I find what percent X is of Y?+
Divide X by Y and multiply by 100. Formula: Percent = (X / Y) × 100.
Is this calculator free?+
Yes. 100% free with no signup. All math runs in your browser.
Is my data private?+
Yes. Nothing is sent to any server.