Calculators
Percentage Calculator
Work out percentages, what percent one number is of another, and percent change.
Calculators
What is X% of Y?
% of = -
X is what percent of Y?
is what % of = -
Percent change from X to Y
from to = -
Three percentage answers in one tool
This covers the three percentage questions that come up most: find a percentage of a number, such as 15 percent of 80, find what percent one number is of another, and find the percent increase or decrease between two numbers. All three update live as you fill them in.
How to calculate a percentage
Fill in whichever of the three rows you need and the answer appears in that row straight away.
Frequently asked questions
How is percent change worked out?
As the new value minus the old value, divided by the old value, times 100. A positive result is an increase and a negative one is a decrease.