Percent Error Calculator

Percent error measures the accuracy of an experimental result compared to a known or accepted theoretical value. It expresses the difference as a percentage of the theoretical value.

The absolute value ensures that the result is always non-negative, treating overestimates and underestimates symmetrically. A 5% error is a 5% error regardless of direction.

In most scientific experiments, a percent error under 5% is considered acceptable. However, the acceptable range depends on the precision requirements of the specific field or experiment.

Percent error compares a measurement to a known theoretical value. Percent difference compares two experimental values to each other, dividing by their average.

Yes, if the experimental value is more than double the theoretical value, the percent error will exceed 100%. This typically indicates a significant measurement error or incorrect setup.