Percent Error Calculator
Calculate the percent error between measured and true values.
Result
Results are estimates for general information only and are not professional advice.
Percent error
Percent error shows how far a measurement is from the true value, as a percentage: |measured − true| ÷ |true| × 100. It is widely used in science and engineering to express accuracy.
Frequently Asked Questions
What is the Percent Error Calculator?
Calculate the percent error between measured and true values. It runs instantly in your browser and is completely free to use.
What do I need to enter to use the Percent Error Calculator?
The Percent Error Calculator asks for the following values (2): Measured value, True value. Fill them in and the result appears immediately — the calculation runs on your own device, so nothing you type is sent to a server.
How accurate is the Percent Error Calculator?
The Percent Error Calculator uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the Percent Error Calculator free, and do I need an account?
Yes. The Percent Error Calculator — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.