Percentage Calculator

Work out any percentage

X% of Y, what percent X is of Y, percentage change, and increase or decrease by a percent.

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X% of Y = X ÷ 100 × Y. For example, 15% of 200 is 30.
X is what % of Y = X ÷ Y × 100. For example, 30 is 15% of 200.
Percentage change from A to B = (B − A) ÷ |A| × 100. For example, 50 to 75 is a 50% increase.
Increase Y by X% = Y × (1 + X ÷ 100). For example, 200 increased by 15% is 230.
Decrease Y by X% = Y × (1 − X ÷ 100). For example, 200 decreased by 15% is 170.

How do I work out a discount?

Choose Decrease by %, enter the price and the discount. A 25% discount on 1,200 gives 900.

Why isn't a 50% rise followed by a 50% fall back to the start?

Each percentage is taken from a different starting value. 100 up 50% is 150, and 150 down 50% is 75.

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

If a rate goes from 4% to 5%, it rose by 1 percentage point, but by 25% in relative terms. This calculator shows the relative change.

Can I share a calculation?

Yes. The numbers are kept in the page address, so copying the link shares the exact calculation.