Percentage Calculator

Find X% of a number, or what percent one number is of another.

Runs in your browser — nothing you enter is sent to our servers

X% of Y
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X as a percentage of Y
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X is Y% of what?
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How it works

A percentage is a number out of 100. Each box answers a different question using the same relationship: part = whole × percentage ÷ 100.

  • X% of Y = Y × X ÷ 100
  • X as a % of Y = X ÷ Y × 100
  • X is Y% of what = X ÷ Y × 100

Calculations run as you type, in your browser. Commas and spaces are ignored.

Example

A R240 invoice has a 15% deposit. 15% of 240 = R36. If a client has paid R36 of R240, they have paid 36 ÷ 240 × 100 = 15%. And if you know R36 was a 15% deposit, the full amount was 36 ÷ 15 × 100 = R240.

Comparing before-and-after values? Use the percentage increase/decrease calculator.

Frequently asked questions

How do I calculate a percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 15% of 240 is 240 × 15 ÷ 100 = 36.

How do I find what percentage one number is of another?

Divide the part by the whole and multiply by 100. 36 out of 240 is 36 ÷ 240 × 100 = 15%.

How do I find the whole when I know a percentage?

Divide the part by the percentage and multiply by 100. If 36 is 15% of a number, the number is 36 ÷ 15 × 100 = 240.

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