What percentage calculations are supported?

Percentage of a number, percentage increase/decrease, and X as a percentage of Y.

Can I apply it to a CSV column?

Yes — reference a column and the formula is applied to every row.

No. Everything runs locally in your browser.

Yes — use the result of one calculation as input for the next.

Yes — the percentage calculator is free to use with generous limits.

Calculate percentages, increases, decreases, and ratios directly in your browser. 100% private, secure, and fast local browse

Your files never leave your device. Processed locally. 100% private.

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Complete your task perfectly in just three straightforward steps.

Select: percentage of number, increase/decrease, or what percentage is X of Y.

Fill in the input fields.

Copy the result to clipboard.

Everything you need to know about the Percentage Calculator.

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