Percentage Calculator
Find X% of Y, percent change, discounts, and more — free and instant.
Percentage calculator
Result
30
20% × 150 = 30
Part 30 / 150
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How percentage calculators help
A percentage is a number expressed as a part of 100. Use these tools to find a percent of a number, measure change between two values, compare differences, or reverse a percent back to the whole. Each calculator keeps the formula on the page so you can verify the result.
Everyday uses
Shoppers check discounts and tips. Students convert scores. Managers track salary and sales growth. Pick a mode above, or open a dedicated calculator for tax, BMI, grades, and more.