Percentage Calculator

Calculate percentages, increases and decreases instantly.

Result
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About This Tool

The Percentage Calculator helps you quickly find percentages of numbers, what percentage one number is of another, and percentage changes — useful for discounts, grades, statistics and everyday math.

How To Use

  1. Choose the type of percentage calculation you need.
  2. Enter the required numbers into the fields.
  3. Click Calculate to see the instant result.
  4. Use Copy to save your result.

Features

  • Three calculation modes in one tool
  • Instant results, no page reload
  • Handles decimals and negative numbers
  • Mobile friendly interface

Frequently Asked Questions

How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 50 is (20/100) × 50 = 10.
How do I find what percentage X is of Y?
Divide X by Y and multiply by 100. For example, 25 is what percent of 200? (25/200) × 100 = 12.5%.
How is percentage change calculated?
Percentage change = ((New Value - Old Value) / Old Value) × 100. A positive result is an increase, negative is a decrease.

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