Percentage Calculator
Every common percentage calculation in one place.
About the Percentage Calculator
The Percentage Calculator handles the three calculations people reach for most: finding a percentage of a number, working out what percentage one number is of another, and calculating percentage increase or decrease. Pick the mode and the answer updates as you type.
Frequently asked questions
Subtract the original value from the new value, divide by the original, and multiply by 100. The percentage-change mode here does this for you and shows whether it is an increase or a decrease.
A move from 10% to 15% is a 5 percentage-point change but a 50% increase. The distinction matters whenever you are comparing two percentages directly.