Editing Ton (section)

===Subdivisions===
Both the UK definition of long ton and US definition of short ton have similar underlying bases. Each is equivalent to 20 hundredweight; however, they are [[long hundredweight|long]] {{convert|112|lb|kg|order=flip}} or [[short hundredweight]] {{convert|100|lb|kg|order=flip}}, respectively.

Before the 20th century there were several definitions. Prior to the 15th century in England, the ton was 20&nbsp;hundredweight, each of 108&nbsp;lb, giving a ton of {{convert|2160|lb|kg}}.{{Citation needed|date=October 2009}}  In the 19th century in different parts of Britain, definitions of 2,240, or 2,352, or 2,400&nbsp;lb were used, with 2,000&nbsp;lb for explosives; the legal ton was usually 2,240&nbsp;lb.<ref>Definitions of 2,000, 2,240, 2,352, and 2,400 lb are included in citations listed in the Oxford English Dictionary, 2nd ed. OED cites an 1858 dictionary of trade products "the legal ton by weight is usually 20 cwt".</ref>

In the United Kingdom, Canada, Australia, and other areas that had used the imperial system, the tonne is the form of ton legal in trade.