Percentage Calculator
Work out percentages: X% of Y, what percent one number is of another, and percentage change.
Runs in your browser — files never leave your device
What is% of = 30
is what % of = 15%
% change from to = 50%
How it works
Fill in the numbers in any of the three rows and the answer updates instantly.
Percentage change is positive for increases and negative for decreases.
Frequently asked questions
- What can it calculate?
- X% of a number, what percent one number is of another, and percentage change between two numbers.
- Is my input uploaded?
- No — all math runs in your browser.
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