What is this tool?
A percentage expresses a value as a fraction of one hundred.
How to use it
Enter a percentage and a value to calculate the result.
Common uses
- Calculate a sale discount, tip, tax, or commission.
- Find part of a total for budgeting and reporting.
- Compare percentage changes in everyday numbers.
Common mistakes
- A percentage change is different from a change in percentage points.
- Make sure the entered value is the correct base amount.
- Avoid rounding intermediate values too early when accuracy matters.
Practical example: Discount calculation example
To find a 20% discount on 150, enter 20 and 150. The discount is 30, so the price after discount is 120.
Privacy
This tool is designed to process your input locally in the browser. Avoid entering passwords, private keys, or other sensitive production data into any online tool.
Frequently asked questions
How is the result calculated?
The percentage is multiplied by the value and divided by 100.
Can I use decimals?
Yes. Both fields accept decimal values.