Percentage Difference Calculator
The percentage difference between two values uses their average as the base — this is different from percent change, because no value here is old or new.
Enter the values — the result will show live here.
How to use
- Enter the first value and the second value in the two boxes.
- The tool averages the two values and divides the difference by that average — neither value is treated as the 'old' one, which is why this differs from percent change.
- Read the percentage difference, the absolute difference and the average, which update live as you type.
- Use this tool for comparing two similar values, such as two prices or two measurements.
Note: Formula: percentage difference = (|V1 - V2| / average of V1 and V2) x 100. If both values are zero, the result is zero.
Tips
- Use this when neither value is the 'before' — for example, comparing two shops' prices.
- For before-and-after comparisons, use percent change instead.
- The result is always positive, no matter which order you enter the values.