Percentage calculator
Find an amount, a part as a percentage, or a change in percentage points.
15% of 200 = 30
Open percentage calculatorChoose by your question
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Choose a percentage, change, difference or reverse percentage calculator. Find the right formula for your question.
Percentage change calculator
Compare a new amount with its starting point.
80 → 100 = 25% increase
Open percentage change calculatorPercentage difference calculator
Compare two non-negative values using their average.
80 vs 100 ≈ 22.22% difference
Open percentage difference calculatorReverse percentage calculator
Recover the original amount before a discount or increase.
800 after 20% off → 1,000
Open reverse percentage calculatorStart with what you know
Use the main percentage calculator for a percentage of an amount, a part as a percentage of a total, or a change in percentage points. Choose a dedicated calculator above when you need a change, an equal comparison or an original amount.
Not sure which formula fits? Read our calculation methodology for examples and limitations. Each calculator includes a worked calculation so you can check the baseline used.