Percent Error Calculator

Compute experimental percent error relative to true accepted theoretical value.

Percent Error Calculator (Lab & Science)

Experimental Measured Value (E)

Theoretical True Accepted Value (T)

Percent Error

3.06%

Formula: (|9.5 - 9.8| / |9.8|) × 100% = (0.3 / 9.8) × 100% = 3.06%

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Percent Error Formula

Calculate experimental accuracy in science labs:

STEP 01

Experimental Value

Enter value measured during your experiment (E).

STEP 02

Theoretical Value

Enter true known theoretical value (T).

STEP 03

Absolute Difference

Calculate |Experimental - Theoretical|.

STEP 04

Divide and Scale

Divide by |Theoretical| and multiply by 100%.

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Percent Error Calculator