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Percentage Calculator — Instant Results

Calculate percentages instantly. Simple %, percentage change, and reverse percentage calculations - all free!

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Percentage Calculator

Choose calculation type and enter values

What is a Percentage Calculator?

A percentage calculator helps you calculate percentages in multiple ways. Whether you need to find what percentage one number is of another, calculate percentage increase/decrease, or work backwards from a percentage - our calculator does it all instantly.

How to Use

  • Simple %: Enter percentage and number (e.g., 20% of 100 = 20)
  • % Change: Enter original and new values for increase/decrease
  • Reverse %: Enter percentage and result to find original number

FAQ

How do I calculate 20% of 100?
Enter 20 in the first box, 100 in the second box, then click Calculate. Result: 20
How do I calculate percentage increase?
Use the "% Change" tab. Enter original value and new value. Positive result = increase, negative = decrease.