The standard unit of measurement is a value that is fixed and cannot be changed. It is needed to have uniformity in measurement.
Unit of measurement
A unit of measurement is a specific magnitude of a quantity that has been established and recognised by law or convention and is used as a benchmark for measuring other quantities of the same kind. A multiple of the unit of measurement can be used to express any other quantity of that type.
A length, for instance, is a physical quantity. A defined, predetermined length is represented by the length unit known as the metre. For instance, "10 metres" (or 10 m) actually refers to 10 times the fixed, specified length known as "metre."
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