Percentage Difference Calculator
Enter two values to find how far apart they are as a percentage.
Percentage Difference — Formula & Guide
Formula
% Difference = |V1 − V2| / ((V1 + V2) / 2) × 100
This is symmetric — neither value is treated as the reference.
Example: 40 vs 50
|40 − 50| / ((40 + 50) / 2) × 100 = 10 / 45 × 100 ≈ 22.22%
% Difference vs % Change
% Difference has no direction — answers "how far apart?"
% Change is directional — compares new to old.
