Free tools / Calculators
Percentage calculator
Calculate percentages, increases, decreases, discounts and percentage change instantly. Copy your result.
Enter your details to get started
Enable JavaScript to use this tool. Processing stays in your browser.
How to use this tool
- 01
Choose the calculation you need.
- 02
Enter both numbers, including decimals or negative values where applicable.
- 03
Read the automatic result and copy it if useful.
Try this: For a 20% discount on 80, choose Discount calculator and enter 80 and 20. The result is 64.
A few useful answers
How are results rounded?
Calculations use the full JavaScript numeric precision; displayed answers use up to 12 significant digits. Percentage change divides the difference by the absolute starting number. A zero starting number has no defined percentage change.