Percentage Calculator

Three quick percentage calculations — answers update as you type. No signup.

What is X% of a number?

% of = 30

X is what percent of Y?

is what % of = 20%

Percentage increase / decrease

from to = +25%

Handy for

Discounts & pricing — "20% off $150" or working out a margin.
Growth & metrics — month-over-month change, conversion rates.
Tips, tax & splits — quick everyday math.

Selling something? Try the discount calculator, profit margin calculator, and conversion rate calculator.