Percentage Calculator

Four common percentage questions in one tool — live answers as you type.

1. What is X% of Y?

What is % of ?

2. X is what percent of Y?

is what % of ?

3. Y is X% of what?

is % of what?

4. Percentage increase / decrease

From to

How to use it

Pick the question that matches what you're trying to figure out and fill in the two known numbers. Useful for tips, discounts, grade scores, tax breakdowns, sales targets — anything involving "of" or "out of".