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Percent Error Calculator

Calculate the percent error between an observed (measured) value and a true (accepted) value. The calculation updates automatically.

Observed Value (Measured)

True Value (Accepted)

Result

-9.0909%

(Absolute Error: 9.0909%)

Steps

Percent Error =

V_observed - V_true

V_true

× 100%

10 - 11

× 100%

-1

× 100%

= -0.09090909 × 100%

= -9.09090909%

Frequently Asked Questions (FAQ)