Percentage Calculator

Four modes, in your browser

Four common percentage questions, each with clearly labeled inputs. Type a number and the answer updates live. Nothing leaves this page.

What is X percent of Y?

The classic. Find a percentage of a number.

What is percent of ?

X is what percent of Y?

Turn a part and a whole into a percentage.

is what percent of ?

Percent change from X to Y

Growth or drop between two values.

From to

Increase or decrease by a percent

Apply a percentage change to a number.

changed by percent

All arithmetic runs locally. No network calls, no tracking.