What is the difference between percentage difference and percentage change?

Percentage difference uses the average of two values, while percentage change uses the original value as the base.

When should I use percentage difference?

Use it when comparing two values equally, rather than measuring growth from a starting value.

It compares two values using their average as the reference point.

This calculator helps you measure the percentage difference between two values using their average as the reference point.

It is commonly used in statistics, pricing comparisons, financial analysis, and data evaluation.

Unlike percentage change, which measures growth from a starting value, percentage difference treats both values equally.

This makes it ideal when neither value is considered the “original”.

The result shows how far apart the two values are as a percentage of their average.

Because the average is used, both values are treated equally.

This makes the result symmetric — swapping values gives the same result.

Formula: |A − B| ÷ ((A + B) ÷ 2) × 100

First, the difference between the values is calculated.

Then, the average is used as the reference point.

Use percentage difference when there is no clear starting value.

Example 1:
£50 vs £65 → 26.09% difference

Example 2 (Pricing):
Supplier A £100 vs Supplier B £120 → 18.18% difference

Example 3 (Analytics):
100 users vs 130 users → 26.09% difference

It compares two values using their average.

Change uses an original value, difference does not.

When comparing two equal values.