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Yes, Percent Error Calculator is completely free to use. No signup or account is required. All processing runs in your browser, so your data stays private.

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Math Tools

Percent Error Calculator

Calculate percent error, absolute error, and relative error between experimental and accepted values

Percent Error Calculator

Calculate percent error, absolute error, and relative error between experimental and accepted values.

Experimental / Observed Value

Accepted / Theoretical Value

Percent Error

3.0612%

Absolute Error

0.3000

Relative Error

0.030612

Formula & Step Breakdown

Percent Error = (|Experimental - Accepted| / |Accepted|) × 100%

Step 1: |9.5 - 9.8| = 0.3000

Step 2: 0.3000 / |9.8| = 0.030612

Step 3: 0.030612 × 100 = 3.0612%

About Percent Error Calculator

Calculate the accuracy of experimental measurements against theoretical or accepted values. Computes absolute error |E - A|, relative error, and percent error with complete step-by-step breakdown.