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Uncertainty propagation calculator

Propagate independent standard uncertainties for two measured quantities.

Applied rule

Addition/subtraction combines absolute uncertainties by root-sum-square; multiplication/division combines relative uncertainties by root-sum-square.

Boundary

The rule assumes independent inputs and first-order propagation; correlated or nonlinear models need fuller analysis.

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

JCGM measurement uncertainty publications. The source supports the underlying convention or review method; it does not endorse LabCrux.