What is the Percent Error Calculator?
Percent error shows how far a measured (experimental) value is from the true (accepted) value. It is used in physics, chemistry and biology lab reports to judge the accuracy of an experiment.
Enter the measured and true values to get the percent error, absolute error and relative error, plus whether the measurement was too high or too low.
How to use the Percent Error Calculator
- Enter your measured (experimental) value.
- Enter the true or accepted value.
- Read the percent error and other results.
Formula
Percent error = |measured − true| ÷ |true| × 100%
Frequently asked questions
What is a good percent error?
It depends on the experiment, but in school labs under 5% is usually considered good and under 1% excellent.
This Percent Error Calculator is 100% free, needs no signup and runs privately in your browser – on phone, tablet or computer.
Last updated: · By NodifyTech