Percentage Difference Calculator
Compare two values symmetrically as a percentage of their mean.
How to use
- Enter values A and B to compare.
- Calculate to see the absolute difference, mean, and percentage difference.
Capabilities and scope
The calculator divides the absolute difference by the absolute mean, so neither input is treated as the baseline.
How it works
It evaluates |A−B| / |(A+B)/2| × 100.
Example
For 100 and 120, the difference is 20 and the mean is 110, giving about 18.1818%.
Useful for
- Compare two experimental measurements
- Compare peer values when no baseline direction is appropriate
Before you use it
- The result is undefined when the mean of A and B is zero.
Frequently asked questions
How is this different from percentage change?
Percentage change is directional from a baseline; percentage difference treats both inputs symmetrically.