Free online tool
Percentage Change Calculator
Compare two values with a signed percentage change and distinguish change from simple percentage-point difference.
Method
Percentage formulas
A percentage is a ratio per hundred. Converting the percentage to a decimal before multiplication keeps the operation explicit.
Percentage change uses the original value as its denominator. A zero original value therefore has no finite percentage change.
Questions
Percentage Change Calculator FAQ
What is the percentage change formula?
Subtract the original value from the new value, divide by the absolute original value, and multiply by 100.
Can percentage change exceed 100%?
Yes. A new value more than twice the original represents an increase greater than 100%.
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