Percentage Calculator
Calculate percentages, percentage changes, increases and decreases.
What is % of ?
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is what % of ?
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What is the % change from to ?
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+ % = ?
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Key Features
- Calculate what percentage one number is of another in a single step.
- Find the result of increasing or decreasing a value by a given percentage.
- Compute the percentage change between two numbers — useful for growth rates.
- Reverse-calculate the original value before a percentage was applied.
- Handles all common percentage problems with clearly labelled input fields.
- Results update instantly as you type — no need to press a button.
Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 is (200 × 15) ÷ 100 = 30.
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original value, then multiply by 100. Going from 80 to 100 is a 25% increase.
What is the difference between percentage and percentage points?
A percentage point is the arithmetic difference between two percentages. If a rate rises from 4% to 6%, that is a 2 percentage point increase, but a 50% relative increase.