ffee All tools
EN 中文 FR DE

Percentage Calculator

Work out percentages, percentage change, increases and decreases instantly.

Percentage calculator

Result: —
Everything is calculated locally in your browser.

How to use the Percentage Calculator

  1. Pick the type of percentage calculation you need.
  2. Enter the two values in the input boxes.
  3. The result is calculated instantly as you type.

Features

Advertisement

More tools

Percentage Change Ratio Calculator Discount Calculator Percent Off Calculator Percent Error Calculator Percent Difference Calculator Reverse Percentage Percent to Fraction Fraction to Percent Percent to Decimal Basis Point Calculator Percentage Point Calculator

Frequently Asked Questions

Common questions about the free online percentage calculator.

Choose the 'What is X% of Y?' mode, then enter the percentage as X and the number as Y.
Use the 'Percentage change' mode and enter the original value as X and the new value as Y.
Select 'X is what percent of Y?' and enter the part as X and the whole as Y.
Use the 'Add X% to Y' or 'Subtract X% from Y' modes to get the final value after the change.
The tool shows 'undefined', because a percentage relative to zero is not mathematically defined.
No, all calculations happen locally in your browser.
Yes. The calculator is fully responsive and works on desktop, tablet and phone.
Yes, it is completely free with no account required.

Last updated: October 10, 2026