Percentage Calculator
Calculate X% of Y, what percentage X is of Y, and percentage change. Simple, fast, and free. No signup required.
About this tool
Use this percentage calculator to find common percentage values quickly, such as a percent of a number, what percent one number is of another, or a simple percentage change.
How to use
- Choose the percentage calculation mode you need.
- Enter the numbers requested by that mode.
- Review the result and adjust the inputs if you want to compare another value.
Example
Finding 15% of a price
If an item costs 80 and you want to find 15% of it, enter 15 as the percentage and 80 as the total. The result is 12.
How it works
Basic percentage formulas
For a percent of a number, the formula is X% of Y = Y x X / 100. To find what percent a part is of a whole, use Percentage = part / whole x 100.
Frequently Asked Questions
How do I calculate X% of Y?
Select the percent-of mode, enter the percentage as X and the total as Y, then calculate the result.
How do I find what percentage one number is of another?
Use the part and whole values. The calculator divides the part by the whole and multiplies by 100.
Can this calculate percentage change?
Yes. Use the percentage change mode when you want to compare an old value with a new value.