In-browser tool
Percentage Calculator
Work out X% of a number, what percent one number is of another, or a percentage increase or decrease — instantly in your browser.
20% of 15030
Calculated in your browser — nothing is uploaded.
How it works
01
Enter the numbers
02
See the result update live
03
Copy or reuse it
Frequently asked questions
How do I calculate a percentage?
Pick a mode and type the two numbers; the result updates live. “X% of Y” multiplies, “X is what % of Y” divides, and “% change” compares an old and new value. Everything is computed on your device.
Is my file uploaded to a server?
No. This tool runs entirely in your browser. You can open your browser's network tab and verify no request carries your file.