Percentage Calculator

Three common percentage questions, solved instantly. Fill in any calculator below and the answer appears as you type.

What is X% of Y?

Percent (%)

Of number

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X is what percent of Y?

Number X

Out of Y

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Percentage increase / decrease

From (old value)

To (new value)

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Percentage formulas

X% of Y = (X ÷ 100) × Y
X is what % of Y = (X ÷ Y) × 100
% change = ((New − Old) ÷ Old) × 100

What's the difference between percentage change and percentage points?

Percentage change compares two values relative to the first. Percentage points are a plain subtraction of two percentages (e.g. 40% to 45% is a 5 percentage-point rise, but a 12.5% increase).