Percentage Difference Calculator

Percentage Difference Calculator: Compare two values with a symmetric percentage difference.

Percentage Difference Calculator

Percentage Difference Calculator: Enter two values. The tool divides their absolute difference by the mean of their absolute magnitudes, then multiplies by 100.

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How to use Percentage Difference Calculator

Enter two values. The tool divides their absolute difference by the mean of their absolute magnitudes, then multiplies by 100.

How Percentage Difference Calculator calculates the result

Symmetric percentage difference = |A − B| ÷ ((|A| + |B|) ÷ 2) × 100. Unlike percentage change, it does not designate either value as the original. Both inputs cannot be zero.

Example

Between 100 and 120, the symmetric percentage difference is about 18.18%.

What to know

This is a symmetric metric, not percentage change. When both values are zero the ratio is undefined.