FREE PRIVATE BROWSER TOOL

Percent error calculator

Calculate absolute percent error from an observed and non-zero reference value.

Applied rule

|observed − reference| / |reference| × 100%.

Boundary

A reference value of zero is undefined, and percent error alone does not validate a method.

Result

Enter your own values or load the documented example, then run the local check.

This tool keeps input only in this page's component state. It does not upload, persist, log, or add your input or result to a URL. Anonymous analytics records only the fixed tool action and pathname.

Method source

NIST Technical Note 1297. The source supports the underlying convention or review method; it does not endorse LabCrux.