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A number of different units (some only of historical interest) are shown and expressed in terms of the corresponding SI unit. Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article.
Mass; system unit unit-code symbol or abbrev. notes sample default conversion combinations SI: kilogram: kg kg 1.0 kg (2.2 lb) kg lb. kg lb st; kg st. kg st lb; gram: g g
While not an SI-unit, the litre may be used with SI units. It is equivalent to (10 cm) 3 = (1 dm) 3 = 10 −3 m 3. Many non-SI units continue to be used in the scientific, technical, and commercial literature. Some units are deeply embedded in history and culture, and their use has not been entirely replaced by their SI alternatives.
conversion combination output units SI: kilogram: kg kg Allows triple output units. See: full list. 1.0 kg (2.2 lb) kg lb; kg st; gram: g g 1.0 g (0.035 oz) g oz; milligram: mg mg 1.0 mg (0.015 gr) mg gr; microgram: μg (ug) μg 1.0 μg (1.5 × 10 −5 gr) non-SI metric: tonne: t t Allows triple output units. See: full list. 1.0 t (0.98 long ...
The first group of metric units are those that are at present defined as units within the International System of Units (SI). In its most restrictive interpretation, this is what may be meant when the term metric unit is used. The unit one (1) is the unit of a quantity of dimension one. It is the neutral element of any system of units. [2]
Statutory Instrument 1995 No. 1804 Units of measurement regulations 1995 From legislation.gov.uk "NIST: Fundamental physical constants – Non-SI units" (PDF). Archived from the original (PDF) on 2016-12-27; NIST Guide to SI Units Many conversion factors listed. The Unified Code for Units of Measure
The gram (originally gramme; [1] SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one thousandth of a kilogram.. Originally defined in 1795 as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre [1 cm 3], and at the temperature of melting ice", [2] the defining temperature (≈0 °C) was later changed to 4 °C ...
The gram (10 −3 kg) is an SI derived unit of mass. However, the names of all SI mass units are based on gram, rather than on kilogram; thus 10 3 kg is a megagram (10 6 g), not a *kilokilogram. The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg. The unit is in common use for masses above about 10 3 kg and is ...