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Description:
The page provides a percent error calculator.
Directions:
Enter the input variables of measured and actual values. Then press the calculate button.
Important note, the units of the input values need to match. This calculator does not provide unit conversion.
Parameter 
Input/Output 
Notes 
measured value 
input 
This is the measured value or result. It is also known as the observed value.

actual value 
input 
This is the theoretical or true value. 
percent error 
output 
Percent error is the absolute value of the difference of the measured value and the actual value divided by the actual value and multiplied by 100. 