Math tool
Percentage Calculator
Calculate a percentage of a number, find what percent one value is of another, and compare percentage change.
Result
Your result will appear here.
Privacy note: most tools process input locally in your browser.
About the Percentage Calculator
Returns several common percentage calculations at once, including percentage of total and percentage change.
How to use this tool
Enter two numeric values and choose Calculate all. Read each labeled result to identify the calculation you need.
Example
25% of 200 is 50; 25 is 12.5% of 200.
Tips for better results
Percentage change is undefined when the starting value is zero.
Frequently asked questions
Can it calculate discounts?
Yes, use the percentage-of-value result.
Why can percentage change be negative?
The ending value may be lower than the starting value.