Percentage Calculator
Three calculators in one: X% of a number, X is what percent of Y, and the percent increase or decrease between two numbers. Results update as you type.
Runs in your browser. Your files never leave your device.
How it works
- 01Choose what you want to find.
- 02Enter the two numbers.
- 03Read the answer.
Tips and common mistakes
Three common questions, three formulas
To find what percentage one number is of another, divide the part by the whole and multiply by 100. To find a percentage of a number, multiply by the percentage and divide by 100. For a percentage increase or decrease, divide the change by the original number and multiply by 100.
Percentage points and percent are not the same
If a rate goes from 10% to 12%, it rose by 2 percentage points, which is a 20% increase relative to the starting rate. Mixing these up is a very common mistake.
Questions
How do I work out a percent increase?
Choose the third option, enter the old number first and the new number second.
Is my file uploaded to a server?
No. Everything happens inside your browser on your own device. Your files are never sent to us or anyone else.
Is it free?
Yes. It is free to use, with no signup, no watermark and no daily limit.