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Percentage Calculator: work out a percentage in one click
Proportion, ratio, increase or decrease, even a discount. Pick the mode that fits.
Result
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Your data never leaves this browser.
Why use this Percentage Calculator?
- 4 modes in one. From a basic calculation to percentage change and discounts.
- Instant results. Numbers update as you type. There's no calculate button.
- Free, no account. Use it right away, no sign-up or install.
How to calculate a percentage
- Pick the calculation mode you need.
- Fill in the two number fields.
- Watch the result appear below.
When you need this calculator
A shopping discount, a raise, or a business margin needs a quick calculation without opening a spreadsheet.
Students use it to work out exam scores, assignment weights, or simple statistics for a report.
Frequently asked questions
What's the formula for X% of Y?+–
The formula is (X ÷ 100) × Y. For example, 20% of 150,000 equals (20 ÷ 100) × 150,000, which comes to 30,000.
How do I calculate a percentage increase or decrease?+–
Use the Percentage change mode. Enter a starting value and an ending value. A positive result means an increase, a negative result means a decrease.
Can this handle a discount or a price increase?+–
Yes, use the Add/Subtract % mode. Pick Subtract to calculate a price after a discount, or Add for a price after an increase.
Is the data I enter stored anywhere?+–
No. Every calculation runs in your browser, and nothing gets sent to a server.