Percentage Calculator

Three everyday percentage calculations with instant results — discounts, tips, grades, growth rates, and more.

What is X% of Y?

Percentage (%)

Of value

—

X is what percent of Y?

Value

Out of

—

Percentage increase / decrease

From

—

How it works

X% of Y multiplies Y by X/100 — that's your discount or tip amount. X is what percent of Y divides X by Y and multiplies by 100 — handy for test scores. Percent change takes (new − old) / old × 100, so going from 80 to 100 is a 25% increase. Results update as you type.