Percent Error Calculator

Calculate the percent error between experimental and theoretical values.

Enter Values

Experimental (Measured) Value

The value you observed or measured

Theoretical (Accepted) Value

The known or expected value

Percent Error Formula

% Error = |Exp - Theo| / |Theo| × 100

Absolute Error:

|Experimental - Theoretical|

Relative Error:

Absolute Error / |Theoretical|

Lower percent error indicates more accurate measurements. In science, typically less than 5% is considered acceptable.

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Error Analysis

Comparing experimental to theoretical

Percent Error2%

Absolute Error0.2

Relative Error0.02

Estimate TypeUnderestimate