Percentage Calculator
Solve every common percentage question: X% of a number, what percent one number is of another, and percentage increase or decrease — with the formula shown for each result.
How to use the Percentage Calculator
- 1
Open the tool above — it is already running, no install or account needed.
- 2
Enter your input and adjust the options to match what you need.
- 3
Copy or download the result — everything was processed locally in your browser.
Private by design
This tool runs 100% inside your own browser using local JavaScript — your input never touches a server. That makes it instant, offline-capable in many cases, and private even for sensitive data.
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