Percentage Calculator
Calculate percentages, percentage change and one value as a percentage of another.
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
Start with the inputs shown above, review the assumptions or options, then generate the result. Where the tool creates a file, keep the original until you have opened and checked the downloaded output.
Frequently asked questions
Is Percentage Calculator free?
Yes. The core tool is free to use without creating an account.
Do I need an account to use Percentage Calculator?
No. You can use the core Toolbox workflow without signing up.
Does Percentage Calculator work on mobile?
Yes. Toolbox is designed for modern mobile and desktop browsers, although complex file workflows can be easier on a larger screen.