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MATH · PERCENTAGES

Percentage Calculator

Calculate a percentage, work backwards from a goal, or explore how changing the numbers changes your result.

How it works

Percentage result = (percentage ÷ 100) × base number. Calculations happen instantly in your browser.

GUIDE

How to use the percentage calculator

Use this calculator for everyday percentage questions, reverse percentages, targets, and quick scenario comparisons.

Steps

  1. Choose the mode that matches your question.
  2. Enter the known values. Results update as you type.
  3. Use Goal mode when you know the result you want and need to work backwards.
Example

Example: 25% of 80 is 20. If 80 is the starting value, a 25% increase gives 100.

Formula / method

Percentage amount = value × percentage ÷ 100.