Percentage Calculator

Calculate a Percentage — Free

Work out any percentage calculation instantly — what percent one number is of another, what a percentage increase or decrease looks like, or what a discount actually knocks off a price.

How to Use the Percentage Calculator

Pick the type of calculation you need — finding what percent X is of Y, applying a percentage change to a number, or finding the difference between two values as a percentage — enter your numbers, and the result appears instantly.

Common Percentage Calculations

"What is X% of Y" answers questions like calculating a tip or a discount. "X is what percent of Y" answers things like figuring out what portion of a budget was spent. Percentage increase and decrease calculations show how much a value has grown or shrunk relative to its starting point — useful for anything from tracking a price change to understanding a statistic in a news article.

Good Uses for This Tool

Working out a discount at checkout, calculating a tip, figuring out what percentage a test score or grade represents, or understanding how much a value has increased or decreased compared to before.

Is It Actually Private?

Yes. The calculation happens entirely in your browser — nothing you enter is sent to a server.