Percentage Calculator
Calculate percentages, increases, decreases and percentage change. Free, instant and built to work well on phone or desktop.
Why use this percentage calculator?
This calculator handles three common percentage questions: a percentage of a number, one number as a percentage of another, and percentage change between two values.
Example
Enter 25 and 200 to calculate that 25% of 200 is 50, or compare an old and new value to estimate percentage change.
Important note
Percentage change uses the original value as the denominator. A zero original value does not have a finite percentage change.
How to use it
Enter, paste or select the information requested above. The result updates in your browser, and you can change the inputs as many times as you need.
Frequently asked questions
Is this tool free?
Yes. The core tool is free to use.
Do I need an account?
No. You can use it without signing up.
Does it work on mobile?
Yes. Toolbox is designed for modern mobile and desktop browsers.