Percentage Difference & Change Calculator

Calculate the percentage difference between two values or the percentage change (growth or decrease) from a start value to an end value.

Calculate the symmetric percentage difference between two values.

First Value

Second Value

Percentage Difference

First Value → Second Value:+0.0%

Second Value → First Value:-0.0%

Symmetric % Difference::0.0%

Absolute Difference::0

Note: This is a <strong>symmetric</strong> calculation relative to the average of both numbers, not to a baseline.

Percentage Difference vs. Percentage Change

((New − Old) ÷ Old) × 100

Directional: From old to new value. Shows growth (+) or decrease (−). Base is the starting value.

(|A − B| ÷ ((A + B) ÷ 2)) × 100

Symmetric: Compares two values without direction. Base is the average of both values. Always positive.