Percentage Calculator
Work out percentages: X% of Y, X as a percent of Y, and percent change between two numbers.
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What Is the Percentage Calculator?
The Percentage Calculator handles the three everyday percentage questions in one place: what is X% of Y, X is what percent of Y, and the percent increase or decrease from one number to another. Results update live as you type, all in your browser.
How It Works
Fill in the numbers for whichever calculation you need. Each row computes instantly — no button required.
When to Use It
Use it for discounts, tips, tax, grades, markups, statistics and any quick percentage math.
Frequently Asked Questions
- How is percent change calculated?
- As (new − old) ÷ |old| × 100. A positive result is an increase, a negative result is a decrease.
Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.
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