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Percentage Calculator
Percent of a number, percentage change, discounts, tax and reverse percentages
What is X% of Y?
Related Tools
Percent of a number, percentage change, discounts, tax and reverse percentages
What is X% of Y?
Related Tools
The Percentage Calculator covers the six problems people actually bring to one: X% of a number, percentage change, reverse percentages, adding a percentage for tax or a tip, taking one off for a discount, and the percentage difference between two values. Each answer shows the arithmetic behind it, so you can check the working rather than trust the box.
The guide behind this tool
Percentage Change vs Percentage Points, and Other Costly Confusions
Down 50 percent then up 50 percent leaves you down 25. Why percentages are not symmetric, and how stacked discounts really multiply.
Pick the calculation you need from the six along the top.
Enter your two values; the result appears as you type.
Read the line under the result to see how it was worked out, and copy the answer if you need it.
Use "Add %" for anything that goes on top, like 19% VAT or a 15% tip, and "Subtract %" for money coming off, like 20% at the till. Both keep your numbers when you switch between them, so you can see the before and after without retyping.
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