Percentage Calculator
X% of Y, change between values, and more.
🔒 Processed on your device — nothing is uploaded.
About the Percentage Calculator
Percentages come up everywhere: discounts, exam marks, salary raises and price changes. Five calculators on one page answer the common questions — X% of Y, what percent one number is of another, percentage change, and increasing or decreasing by a percentage.
When to use it
- Working out a sale price after a discount
- Converting exam marks to a percentage
- Calculating a pay rise or price increase
- Comparing growth between two months or years
Tips for the best results
- “% change” is negative when the new value is smaller
- To reverse a discount, divide the sale price by (1 − discount ÷ 100)
- Results update as you type — no button to press
How to use the Percentage Calculator
- Enter your numbers in the Percentage Calculator.
- Results update as you type.
- Change any value to compare scenarios.
Percentage Calculator FAQ
Is the Percentage Calculator free?
Yes. The Percentage Calculator is completely free with no sign-up, no daily limit and no watermark.
Is it safe to use the Percentage Calculator with private files?
Yes. The Percentage Calculator runs entirely inside your web browser, so your files and text are never uploaded to any server.
Does the Percentage Calculator work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.
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