Units of Mass
Mass is a base dimension in the International System of Units. The SI unit of mass is the kilogram, which is equal to the mass of the international prototype of the kilogram (3rd CGPM, 1901).
Maple knows the units of mass listed in the following table.
drachms, dram, drams
An asterisk ( * ) indicates the default context, an at sign (@) indicates an abbreviation, and under the prefixes column, SI indicates that the unit takes all SI prefixes, IEC indicates that the unit takes IEC prefixes, and SI+ and SI- indicate that the unit takes only positive and negative SI prefixes, respectively. Refer to a unit in the Units package by indexing the name or symbol with the context, for example, gram[SI] or lb[avoirdupois]; by using an abbreviation, for example, AT; or, if the context is indicated as the default, by using only the unit name or symbol, for example, gram or lb.
The units of mass are defined as follows.
A tonne is defined as 1000 kilograms.
An electron mass is defined as 9.1093897×10−28 gram.
An atomic mass unit is defined as 112 the mass of the carbon-12 atom, or approximately 1.6605402×10−27 kilogram.
An avoirdupois, troy, or apothecary grain is defined as 0.00006479891000 kilogram or as 17000 avoirdupois pound.
A metric grain is defined as 50 milligrams.
An avoirdupois drachm is defined as 116 avoirdupois ounce.
An avoirdupois ounce is defined as 116 avoirdupois pound.
An avoirdupois pound is defined as 0.45359237 kilogram.
An avoirdupois clove is defined as 8 avoirdupois pounds.
An avoirdupois stone is defined as 14 avoirdupois pounds.
An avoirdupois quarter is defined as 28 avoirdupois pounds.
An avoirdupois cental is defined as 100 avoirdupois pounds.
An avoirdupois quintal is defined as 100 avoirdupois pounds.
A metric quintal is defined as 100 kilograms.
A short hundredweight is defined as 100 avoirdupois pounds.
A long hundredweight is defined as 112 avoirdupois pounds.
A metric hundredweight is defined as 50 kilograms.
An avoidupois wey is defined as 252 avoirdupois pounds.
A kip (kilo Imperial pound) is defined as 1000 avoirdupois pounds.
A short ton is defined as 2000 avoirdupois pounds.
A long ton is defined as 2240 avoirdupois pounds.
A metric ton is defined as 1000 kilograms.
A troy pennyweight is defined as 24 troy grains.
A troy ounce is defined as 20 troy pennyweights.
A troy pound is defined as 12 troy ounces.
An apothecary scruple is defined as 20 apothecary grains.
An apothecary drachm is defined as 3 apothecary scruples.
An apothecary ounce is defined as 8 apothecary drachms.
An apothecary pound is defined as 12 apothecary ounces.
A (short) assay ton is defined as that mass such that milligrams per (short) assay ton equals troy ounces per short ton, or 7240 kilogram.
A long assay ton is defined as that mass such that milligrams per long assay ton equals troy ounces per long ton, or 491500 kilogram.
A metric carat is defined as 0.2 gram.
A diamond carat is defined as 3.2 troy grains.
A millier is defined as a tonne.
A mite is defined as a 120 avoirdupois grain.
A mancus is defined as a 2 avoirdupois ounces.
A merchant pound is defined as a 16 avoirdupois ounces.
A mast is defined as a 2.5 troy pounds.
A slug is defined as the mass that is accelerated at 1 foot per second squared by a force of 1 poundforce, or 14.59390294 kilograms.
A metric slug or hyl is defined as that mass that is accelerated at 1 meter per second squared by a force of 1 kilogramforce, or 9.80665 kilograms.
A crith is defined as the mass of 1 liter of hydrogen at standard temperature and pressure, approximately 89.885 milligrams.
A jupiter is defined as the mass of the planet Jupiter, approximately equal to 1.899 yottatonnes.
A planck mass is defined as the square root of: the planck constant times the speed of light, divided by twice π times the Newtonian gravitational constant.
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