Percentage Calculator

Four common percentage calculations, updated instantly as you type.

% ofis

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Overview

Four common percentage calculations in one place: find a percentage of a number, work out what percentage one number is of another, calculate percentage change between two values, and apply a percentage increase or decrease.

Formulas

  • X% of Y: Y × (X / 100)
  • X is what % of Y: (X / Y) × 100
  • Percentage change from X to Y: ((Y − X) / X) × 100
  • X increased/decreased by P%: X × (1 ± P / 100)

How to use this calculator

  1. Pick the calculation you need from the four tabs.
  2. Enter the numbers.
  3. The result updates instantly as you type.

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