Percentage Calculator

Pick what you want to work out, enter the two numbers, and calculate.

How it works

X% of Y = (X ÷ 100) × Y. X as a percent of Y = (X ÷ Y) × 100. Percentage change = ((Y − X) ÷ |X|) × 100.

Worked example

15% of 200 is 30. And 30 is 15% of 200. A change from 100 to 125 is a 25% increase.

Frequently asked questions

How do I find a discount price?

Work out the discount with X% of Y, then subtract it from Y. A 15% discount on 200 is 30 off, so the sale price is 170.

This calculator gives an estimate for planning. It does not account for taxes or deductions unless stated. See the disclaimer.