Percentage Calculator
Quick percentage math: find a percentage of a number, what percent one value is of another, or the percentage change between two values.
What is % of = 30
is what % of = 20%
Change from to = +20%
How to use the Percentage Calculator
- Fill in the numbers in any row.
- Results update instantly.
- Read your percentage answer.
100% free, no sign-up, and it all runs in your browser — your data never leaves your device.
FAQ
How is percentage change calculated?
(new − old) ÷ old × 100. A positive result is an increase, negative is a decrease.