Percent Error
MathematicsCalculate the experimental percent error between an observed measurement and an accepted true reference value for physics labs, chemistry experiments, and quality control benchmarks.
About this calculator
In scientific laboratory courses and manufacturing quality control, comparing empirical measurements against theoretical benchmarks is crucial for quantifying systematic bias and random measurement variations.
The percent error formula determines the relative discrepancy expressed as a percentage of the true value. Low percentage errors indicate high experimental accuracy, whereas large deviations indicate calibration errors, parallax bias, or unmodeled environmental factors.
How It Works & Formula
Absolute error is evaluated as |Experimental - True|. Dividing the absolute error by |True| and multiplying by 100% yields the relative percent error. Both signed relative change and unsigned absolute percent error are reported.
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