Percentage Calculator

Three calculators in one — find a percentage of a number, what percent one number is of another, and the percentage change between two values.

What is X% of Y?

Percentage

of value

15% of 200 is30

X is what percent of Y?

Value

of total

30 is20%

Percentage change from X to Y

From

Change▲ 25%

Common percentage formulas

X% of Y = (X ÷ 100) × Y. X is what % of Y = (X ÷ Y) × 100. % change = ((new − old) ÷ old) × 100.

FAQ

What’s the difference between percentage change and percentage points? Percentage change is relative to the starting value; percentage points are the plain difference between two percentages.

Is anything stored? No — it all runs in your browser.