💯 Percentage Calculator
Calculate percentages, discounts, tips, and percentage changes easily. Free online percentage calculator.
How to Use the Free Percentage Calculator
Our free percentage calculator handles three common percentage calculations: finding a percentage of a number, calculating percentage change between two values, and computing tips. Simply select the mode and enter your numbers.
This online percentage calculator is perfect for shopping discounts, financial calculations, tip splitting, and academic work. All calculations are done instantly in your browser.
Common Uses
- Calculate sale discounts and final prices.
- Determine tip amounts at restaurants.
- Track percentage changes in investments or grades.
- Compute tax amounts and interest rates.
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Frequently Asked Questions
Is this percentage calculator free to use?
Yes, completely free. There are no hidden charges, no account sign-ups, and no usage limits. You can run as many calculations as you like, as often as you need.
How do I calculate my exam marks percentage?
Divide your obtained marks by the total marks and multiply by 100: (obtained / total) × 100. Or use this tool's "X is what % of Y" mode — enter your obtained marks as X and the total marks as Y, and it gives you the percentage instantly.
Can I calculate profit percentage with this tool?
There's no dedicated profit mode, but you can work it out easily. Use the "Percentage Change (Old → New)" mode with your cost price as the old value and your selling price as the new value — the result is your profit (or loss) percentage.
What's the formula for percentage change?
The formula is ((New Value − Old Value) / Old Value) × 100. A positive result means an increase, and a negative result means a decrease. The "Percentage Change (Old → New)" mode applies this formula for you.
Is my data stored anywhere?
No. Everything runs entirely in your browser. Your numbers never leave your device — they're not sent to a server, logged, or stored anywhere.