basic

Percentage Difference Calculator

Symmetric percentage difference between two values.

Compute the percentage difference between two values using the absolute difference divided by their average — useful when neither value is "the original".

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
Was this helpful?

How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

% difference = |a − b| / ((a + b)/2) × 100

In depth

Compute the percentage difference between two values using the absolute difference divided by their average — useful when neither value is "the original".