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Percentage Calculator

A fast, free percentage calculator with the three calculations people need most: what is X% of a number, what percent one number is of another, and the percentage increase or decrease between two values.

Result
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How to use the Percentage Calculator

  1. 1Choose the calculation you need.
  2. 2Enter your two numbers.
  3. 3The answer updates instantly — copy or note it down.

Frequently asked questions

How do I find X% of a number?+

Multiply the number by the percent and divide by 100. For example, 20% of 150 = 150 × 20 ÷ 100 = 30. The calculator does this for you.

How do I calculate percentage increase?+

Subtract the old value from the new value, divide by the old value, and multiply by 100. The “increase/decrease” mode handles it automatically.