Percentage Error Calculator

This percent error calculator finds the error between an observed value and the true value of a measurement

Calculate

True Value

Observed Value

Answer/Formula:

x = \frac{True Value - Observed Value}{True Value} * 100% = \frac{100 - 20}{100} = 80%

To convert a fraction into a percentage multiply the numerator with 100 and divide the result with the denominator.