Percent Difference Calculator
Percent difference measures how far apart two numbers are, using their average as the reference. Unlike percent change, it does not care which number came first.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Find the gap between the two numbers, ignoring the sign. Divide that gap by the average of the two numbers, then multiply by 100.
Because both numbers count equally, swapping them gives the same answer.
Worked example
Comparing 80 and 100, the percent difference is 22.22 percent.
Questions
How is this different from percent change?
Percent change needs a starting value and an ending value. Percent difference treats two values as equals, so it works when neither one is the original.
Can the answer be negative?
No. The gap is taken as a size, so the answer is zero or positive.
What if both numbers are zero?
Then the average is zero, and the percent cannot be worked out. Enter a number above zero.
More like this
- Percent Change CalculatorPercent up or down between two numbers.
- Fraction to Percent CalculatorTurn a fraction into a decimal and a percent.
- Percent Error CalculatorHow far a measurement is from the accepted value.
- Average CalculatorMean of a list of numbers.
- Standard Deviation CalculatorSpread of a list of numbers.
- Weighted Average CalculatorAverage where some values count more.