Percentage Calculator

Work out percentages, percentage change, increases, decreases and reverse percentages with every step shown.

Works offlineCalculators

What is X% of Y?

Percentage (%)

Of value

Enter both values to see the answer.

X is what percent of Y?

Value

Total

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Increase X by Y%

Starting value

Increase by (%)

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Decrease X by Y%

Starting value

Decrease by (%)

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Percentage change from X to Y

From

To

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X is Y% of what?

Known value

Is this percent (%)

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About the percentage calculator

Six of the percentage questions people actually run into, each as its own small form: what is X% of Y, X is what percent of Y, percentage increase and decrease, percentage change between two numbers, and reverse percentage to recover an original value from a discounted one. Each answer shows the formula it used so you can check the reasoning.

This tool runs entirely in your browser. Nothing you type is uploaded, and it keeps working with no connection at all — including as an installed app.