- Metric System , a system of units developed in France in the 18th century
- --- SI , or ''Système International'', the international system of units since 1960, a subset of the former
- Metrics , a system of parameters that are measured
- Metrics (networking) , set of properties of a communication path
- Metre (music) , a measurement of rhythmic units in music
- Metre (poetry) , the linguistic sound patterns of a verse
- Metric (band) , a Canadian indie rock band
- In Mathematics :
- --- Metric (mathematics) , an abstraction of the notion of ''distance'' in a Metric Space
- --- Norm (mathematics) , an abstraction of the notion of ''size'' in a Normed Vector Space
- --- Metric Tensor , a symmetric tensor of rank 2 used to measure distance
- Software Metrics , a measure of some property of a piece of software or its specifications
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