Percentage Calculator

Calculate percentages, percentage change and increases or decreases.

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About the Percentage Calculator

Percentage Calculator answers the most common percentage questions in one place: what is X% of Y, what percentage X is of Y, the percentage change between two values and a value increased or decreased by a percentage.

How to use the Percentage Calculator

Choose the calculator that matches your question.
Enter the two values.
Read the result, which updates instantly.

Frequently asked questions

How is percentage change calculated?

(New value − old value) ÷ old value × 100. A negative result means a decrease.

Can I use decimals?

Yes. Decimals and negative numbers are supported.