basic

Absolute Percentage Error Calculator

APE = |actual − forecast| / |actual| × 100.

Calculates the Absolute Percentage Error (APE) between a forecast and actual value, plus the mean APE (MAPE) if multiple pairs are entered as an average across n observations.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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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

APE = |actual − forecast| / |actual| × 100 (%)

In depth

Calculates the Absolute Percentage Error (APE) between a forecast and actual value, plus the mean APE (MAPE) if multiple pairs are entered as an average across n observations.