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Percentage Calculator

Work out X% of Y, or what percent X is of Y, with the formula shown.

Processed in your browser. Nothing you enter is uploaded.

Numbers may include commas or decimals. The formula used is shown with the result.

How to use it

  1. Choose whether you want X% of Y or what percent X is of Y.
  2. Enter the two numbers.
  3. Read the result and the formula used.
  4. Copy the result.

Examples

A percentage of a number
Input:20% of 50
Result:10
What percent
Input:10 is what % of 50
Result:20%

What does Percentage Calculator do?

Percentage Calculator works out X% of Y, or what percent X is of Y, and shows the formula it used.

How does Percentage Calculator work?

It evaluates a/100 × b or a/b × 100 with standard number arithmetic and checks the result is finite. The calculation runs in your browser.

Is my data uploaded?

No. The numbers you enter stay in your browser.

Which formats and inputs does Percentage Calculator support?

Inputs: Two numbers, with commas or decimals allowed, and a calculation type. Output: The result and the formula with your numbers filled in.

What are the limits and limitations of Percentage Calculator?

Limits: result must be a finite number; dividing by zero is refused. It performs the arithmetic only and makes no tax, financial or rounding-rule assumptions.

More questions

What happens if the whole is zero?

Dividing by zero is undefined, so the calculator shows a message instead of a number.

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