Percentage Calculator
6 percentage calculation modes: basic %, % of total, % change, add %, subtract %, and reverse %. All results update live as you type.
What is X% of Y?
Result = (X ÷ 100) × Y
X is what % of Y?
Result = (X ÷ Y) × 100
% change from X to Y?
Result = ((Y − X) ÷ |X|) × 100
X + Y% =?
Result = X × (1 + Y ÷ 100)
X − Y% =?
Result = X × (1 − Y ÷ 100)
Y is X% of what?
Result = Y ÷ (X ÷ 100)
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Percentage Calculator
This tool covers the 6 most common percentage calculations: finding a percentage of a number, expressing one number as a percentage of another, calculating percentage change between two values, adding or subtracting a percentage from a number, and reverse percentage calculation. All results update in real time as you type.
6 Calculation Modes
- Basic %: What is X% of Y? — e.g. What is 15% of 200? = 30
- % of total: X is what % of Y? — e.g. 30 is what % of 200? = 15%
- % change: Change from X to Y — e.g. 100 to 130 = +30% increase
- Add %: X + Y% — e.g. 200 + 15% = 230
- Subtract %: X − Y% — e.g. 200 − 15% = 170
- Reverse %: Y is X% of what? — e.g. 30 is 15% of 200
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