Percentage Calculator
Find X% of Y, what percent X is of Y, and percentage change — free and instant.
About this tool
Percentages show up everywhere — discounts, tips, exam marks, growth figures. This calculator covers the three percentage questions people ask most: what is X% of a number, what percentage one number is of another, and how much something changed in percent terms.
Everything runs in your browser as you type, so there is no waiting and no data ever leaves your device.
How to use
- Pick the tab that matches your question: X% of Y, X as % of Y, or % change.
- Enter the two numbers in the labeled boxes.
- Read the result instantly — it updates with every keystroke.
Frequently asked questions
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