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Instant result
The result is updated directly from the data entered.
Online Calculator
Percentage error calculator
Compare a theoretical value with one measured and get the absolute and percentage error.
Absolute error
3
Percentage error
3%
Information
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Local processing
The calculations are done in your browser without sending the values to a server.
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Free
No registration, subscription, or paid API required.
Frequently asked questions
How is percentage error calculated?
Divide the absolute error by the absolute value of the true value, then multiply by 100.
What is absolute error?
It is the absolute difference between the measured value and the actual value.
What if the real value is zero?
Percentage error is undefined because it would require dividing by zero.
Does it support decimal values?
Yes.