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Published online by Cambridge University Press: 12 June 2017
The fundamental unit of the metric system is the METER (the unit of length) from which the units of mass (GRAM) and capacity (LITER) are derived; all other units are the decimal subdivisions or multiples thereof. These three units are simply related, so that for all practical purposes the volume of one kilogram of water (one liter) is equal to one cubic decimeter.