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Percentage calculator

Instantly calculate what X% of an amount is, with the formula and an example always visible so you can verify the calculation.

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% of

Result

30

Applies the formula (value x percent) / 100 to get the exact result.

Use cases

  • Calculating a tip or commission.
  • Calculating what a part represents of a budget.
  • Quickly verifying percentage calculations.

How it works

  1. 1

    Enter the percentage

    Type the percentage you want to calculate.

  2. 2

    Enter the value

    Type the amount the percentage applies to.

Technical details

  • Works out X% of a value. Example: 21% of 150 is 150 × 21 / 100 = 31.5.
  • Percentages above 100 (150% of 40 is 60) and negative values are accepted.
  • The result is rounded to 2 decimal places. You can type decimals with a comma or a dot (12.5 or 12,5).

Frequently asked questions

What's the formula?

Result = (value x percent) / 100. For example, 15% of 200 is (200 x 15) / 100 = 30.

What if I want to know what percent one number is of another?

This calculator solves "X% of Y". To find what percent 30 is of 200, divide 30 by 200 and multiply by 100 (15%); if you're comparing two values over time, use the percentage increase calculator.

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