Everything about Hundredweight totally explained
Hundred weight or
hundredweight is a
unit of measurement for
mass in
U.S. customary units and was historically used in the Imperial system in the
United Kingdom and the
British Commonwealth. However, its definition differs in the two systems.
- In Imperial units, a hundredweight ('long') is defined as 112 pounds avoirdupois, or 8 stone, or four quarters (50.80234544 kg). This is so close to 50 kg that the transition to metric equivalents has been easy.
- In U.S. customary units, a hundredweight ('short') is defined as 100 pounds (equivalent to 45.359237 kg). The short hundredweight is also the normal hundredweight in Canada.
- The short hundredweight is also called a cental (which never means a long hundredweight), especially in places which normally use the long hundredweight. See Conversion of units
In both systems, there are twenty hundredweights to a
ton – the
long ton of 2240 pounds (approximately equal to a
metric tonne), and the
short ton of 2000 pounds. In both systems, the hundredweight is
abbreviated cwt, where
wt is an abbreviation for
weight and
c is an abbreviation for
one hundred (since the
Roman numeral C is equal to 100).
Prior to the 15th century in England, a hundredweight used the old hundred of 108 lb, giving a ton of 2160 pounds. In some industries (notably forges) this old hundred was retained somewhat longer. The London hundredweight of 112 pounds eventually replaced the old hundred.
The short hundredweight is commonly used in the sale of
livestock and some
cereal grains and
oilseeds and on
futures exchanges. The long hundredweight is now little used in any country, except sometimes for measuring the
bells used for
change ringing. In the UK and Ireland, the few household commodities that were commonly sold by the hundredweight, such as
coal and some
building materials, are now sold in 50 kg or 25 kg quantities. For most purposes metric units are now in use in the UK, while other Commonwealth countries and Ireland have adopted the metric system in full.
Further Information
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