Mittausluku

Mittausluku is a Finnish term used to refer to the numerical result of a measurement. It denotes the value that a measuring instrument indicates for a quantity of interest, expressed together with its unit and, in precise contexts, with an associated measurement uncertainty. The term is used across science, engineering and everyday language. It is not the instrument itself nor the measurement method, but the outcome obtained from performing the measurement.

In metrology and scientific reporting, the mittausluku is expected to be traceable to reference standards, and it is common to provide an uncertainty estimate that indicates the possible deviation from the true value. The mittausluku can be affected by systematic and random errors, instrument resolution, calibration status, environmental conditions, and the observer's method.

Common usage includes lab notes, equipment readouts and standard form reports, where researchers write "mittausluku" followed by a numeric value and unit, sometimes accompanied by an uncertainty interval or confidence interval. The term is often used interchangeably with mittausarvo, although some writers differentiate subtle connotations: mittausluku emphasizes the act of measuring and the resulting numeric readout, while mittausarvo stresses the value itself.

Examples: a thermometer shows a mittausluku of 37,2 °C; a scale indicates 12,5 kg. In data analysis, mittausluvut from multiple measurements can be summarized by statistics such as mean and standard deviation.