Percentage calculator
Free · no sign-upThree common percentage questions, answered instantly.
Runs entirely in your browser — your data never leaves your device and nothing is stored. No sign-up.
The three percentage questions you actually ask — answered instantly. Find X% of a number, work out what percent one number is of another, or calculate the percentage change between two values. Free, no sign-up.
- ✓Percent of a number
- ✓One number as a % of another
- ✓Percentage increase or decrease
- ✓All three in one place
- ✓Free — updates as you type
Who it's for
- Discounts and markups
- Grades, shares and ratios
- Growth or drop between two numbers
- Everyday percentage maths
How it works
- 1Pick the question you need.
- 2Type your two numbers.
- 3Read the answer instantly.
- 4Use it anywhere.
Frequently asked questions
How do I find a percentage change?+
Enter the original and new value — the calculator returns (new − old) ÷ old as a percentage, positive for an increase and negative for a decrease.
What's “X is what % of Y”?+
It tells you the share one number is of another — for example, 30 is 25% of 120.
Is it free?+
Yes, completely free.
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