Calculate the percentage error between an experimental (observed) value and a theoretical (accepted) value. Used in science, lab experiments, and quality control.
Percentage error measures how far an experimental value is from the true/accepted value, expressed as a percentage.
Percentage Error = |Experimental - Theoretical| / Theoretical x 100%
Enter the experimental (measured) value and theoretical (expected) value, then click Calculate.
If measured gravity = 9.8 and accepted = 9.81, then % Error = |9.8-9.81|/9.81 x 100 = 0.102%