Percentage Calculator

Calculate percentages — what is X% of Y, percentage change, and more.

A free online percentage calculator: find X% of Y, work out what percent X is of Y, and calculate percentage increase or decrease — all in one place, with instant results.

How to use

Pick a mode, enter the two numbers, and the result appears instantly.

Choose a mode, e.g. ‘X% of Y’ or ‘percent change’
Enter the first number
Enter the second number
Read the instant percentage result

Formula

X% of Y = (X ÷ 100) × Y | % change = ((new − old) ÷ old) × 100

FAQ

What is 20% of 150?

20% of 150 = 30.

30 is what percent of 150?

30 is 20% of 150.

From 80 to 100 — what's the percentage increase?

A 25% increase.