Percentage Error
MATHEMATICS
Percentage Error
Compare a measured value with a nonzero reference.
UNDERSTAND YOUR RESULT
How it works
Compare a measured value with a nonzero reference.
THE CALCULATIONabsolute percentage error = |measured−reference|/|reference| × 100
Using this calculator
Enter measured value, nonzero reference value. absolute percentage error = |measured−reference|/|reference| × 100.
What to keep in mind
Finite real numbers unless a complex or exact-integer result is specified. Outputs are rounded for display. Matrix calculations use floating-point arithmetic.
Frequently asked questions
Are my entries saved?
No. Calculator inputs remain in the current page and are cleared when you reload or leave. The tools do not upload your entries.
Why are results rounded?
The display is rounded for readability. Calculations use unrounded intermediate values. An estimate should not be interpreted as an exact measurement.