Percentage Difference Calculator
Percentage difference is used when neither value is clearly the "original" — it divides the difference by the average of the two values rather than by a starting point.
Percentage difference
18.18%
Absolute difference
20
Average of the two values
110
How this was worked out
- Step 1|120 − 100| = 20
- Step 2Average = (120 + 100) ÷ 2 = 110
- Step 320 ÷ 110 × 100 = 18.18%
Formula
Percentage difference = (|A − B| ÷ ((A + B) ÷ 2)) × 100
Frequently asked questions
Use percentage difference when comparing two values with no clear starting point, such as two measurements of the same quantity. Use percentage change when one value is clearly the "before".
Yes, because it uses the absolute value of the difference.
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