Percentage Calculator
Work out percentages, percentage change and 'X is what percent of Y'.
Percentage Calculator
This tool runs entirely in your browser. Your files never leave your device.
How to use
- 1Choose the type of calculation with the tabs.
- 2Enter your two numbers.
- 3The result updates automatically.
About this tool
The Percentage Calculator handles the three most common percentage questions: finding a percentage of a number, expressing one number as a percentage of another, and calculating the percentage increase or decrease between two values.
Benefits & use cases
- Quickly check discounts, tips and tax.
- Compare figures such as revenue or scores month to month.
- Verify percentages in reports and homework.
Frequently asked questions
How is percentage change calculated?
Percentage change is (new − old) ÷ |old| × 100. A negative result is a decrease.
Does this store my numbers?
No. The calculation runs entirely in your browser.