Percentage Calculator
Calculate a percentage of a value, percentage ratios, increases, reductions and percentage changes.
Hover over or focus a field for help. Press Escape to close.
How it works
Choose your options and run the tool. Copy the result or download it as a file.
A practical example
Enter values
100 × 20%
Result
20
Frequently asked questions
Is my input sent to a server?
No. Your content is processed in this browser. It is never sent to the server or saved.
What should I know about Percentage Calculator?
A is the base value for percentage, increase and decrease; B is the percentage. For ratio use A/B; for change use old A and new B, divided by the absolute old value. Results have up to 12 significant digits.