Percentage Calculator
Free, instant percentage calculators. No sign-up, no fuss, just accurate results with step-by-step workings.
Why use percentages.co.uk?
Whether you need to work out a sale price, calculate a tax amount, figure out how much something has increased, or split a restaurant bill, our free percentage calculators handle it all instantly. Every calculation shows clear step-by-step workings so you can understand exactly how the answer was reached.
All calculators are free to use, work on any device, and require no account or sign-up. We do not store your calculations or personal data.
How to calculate a percentage
The core percentage formula is: Percentage = (Part ÷ Whole) × 100. For example, if 30 out of 150 students passed a test, the pass rate is (30 ÷ 150) × 100 = 20%.
To find a percentage of a number (such as 15% of 200), you divide the percentage by 100 and multiply by the number: (15 ÷ 100) × 200 = 30.
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