Percent Difference Calculator
Find the percent difference between two values (relative to their average).
Change the values and press Calculate to work out your own figures.
Enter the two values.
Show the working
- Percent difference = |a − b| ÷ ((a + b) ÷ 2) × 100
How to use it
Enter the two values.
Numbers can be whole numbers, decimals (0.75), fractions (3/4), mixed numbers (1 1/2), repeating decimals (0.(3)) and, where a percent is asked for, percentages (75%). Show the working gives each step.
Key facts
|a − b| ÷ ((a + b) ÷ 2) × 100
Difference or change?
Percent difference compares two values without a starting point, using their average; percent change measures from an original value.
Questions
What is the percent difference between 75 and 100?
28.571428…%.
Is it the same as percent change?
No: percent change divides by the original value.
Formulas
|a − b| ÷ ((a + b) ÷ 2) × 100
Sources
Limitations
- Numbers have at most 120 digits.