How to use this calculator
- Enter the percentage you want to calculate.
- Enter the base number.
- Read the result instantly—no button needed.
Example
For example, 15% of 120 is 18. This is the same as multiplying 120 by 0.15.
How it works
Calculate any percentage of a number instantly with this free online percentage calculator. Inputs are calculated directly in your browser and the result updates whenever a value changes.
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percentage by 100, then multiply it by the number.
Can I use decimals?
Yes. Both fields accept whole numbers, decimals and negative values.