Skip to content
Convert tools

Percentage Calculator

Calculate a percentage of a number, one number as a percentage of another, or the percentage change from A to B.

Convert in your browser · No sign-up

Percentage change uses A as the starting value. A zero denominator is invalid. Decimal results are rounded to 13 significant digits.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

Result

Add your input or load an example, then run the tool. Your result will appear here.

How to use

  1. Calculate a percentage of a number, one number as a percentage of another, or the percentage change from A to B.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

15% × 200 = 30

Details and limitations

Text stays in your browser; it is not sent to a conversion server.

Format references

Tool page updated: