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Percent Error Calculator

Magnitude of error between an experimental and a theoretical value.

Compute the percent error between an experimental measurement and the accepted theoretical value.

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

% error = |experimental − theoretical| / |theoretical| × 100

In depth

Compute the percent error between an experimental measurement and the accepted theoretical value.