Percentage Calculator

10 tools

Percentage of a number, and percentage change.

Runs in your browser — your files and text stay on your device

Three quick percentage calculations: X% of a number, what percent one number is of another, and a number increased or decreased by X%. Enter your values and each result updates instantly. The calculation runs in your browser.

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X% of Y

X (%)Y

Result

X is what % of Y

Result

25%

Increase / decrease Y by X%

X (%)Y

Result

220

How to use this tool

1Pick the calculator: "X% of Y", "X is what % of Y", or "Increase/decrease Y by X%".
2Enter the numbers.
3For increase/decrease, choose a direction.
4The result updates instantly.

Frequently asked questions

How is "X% of Y" calculated?

(X ÷ 100) × Y.

How is "X is what % of Y" calculated?

(X ÷ Y) × 100.

Is my data sent anywhere?

No — all calculations run entirely in your browser.

Guides

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