Percentage Calculator

Enter two numbers to instantly calculate percentage increase, percentage decrease, percentage difference, or reverse percentage. Results update automatically, and you can copy the answer with one click.

Positive values indicate an increase; negative values indicate a decrease.

Percentage Increase & Decrease Calculator

Example: Increase from 80 to 100 = 25%. Decrease from 100 to 80 = −20%.

Percentage Difference Calculator

Example: The percentage difference between 40 and 60 is 40%.

Percentage of a Number

Example: What is 15% of 200? The answer is 30.

What Percent Is One Number of Another

Example: 50 is what percent of 200? The answer is 25%.

Reverse Percentage Calculator

Example: If 40 is 20%, the original number is 200.

Frequently Asked Questions

Common questions about how percentage calculations work and how to use this calculator.