Percentage Calculator

Calculate a percentage of a number, one number as a percentage of another, and percentage change.
Percentage
Number

Result

30

How to use this tool

Solve three common percentage problems: find a percentage of a number, express one number as a share of another, or calculate change between two values.

Steps

  1. Choose the required calculation.
  2. Enter the source numbers; the result updates automatically.
  3. For change calculations, a positive result means an increase and a negative result means a decrease.

Useful for

  • Calculating discounts or markups
  • Comparing measurements
  • Checking percentage exercises

Limits and accuracy

  • A share or percentage change cannot be calculated from a zero source value.
  • Displayed values are rounded to at most eight decimal places.

Privacy

All values and results are processed only in your browser.