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{{short description|U.S. unit of mass (2,000 pounds or 907.18474 kg)}}
The '''short ton''' (abbreviation '''tn'''<ref name=NIST44-C>
{{cite web
| url = https://www.nist.gov/system/files/documents/2023/01/30/appc-23-HB44.pdf
| title = NIST Handbook 44 Specifications: Handbook 44 – 2023 Appendix C – General Tables of Units of Measurement
| page = C-7
| date = November 18, 2022
| access-date = May 9, 2023
| quote = 20 hundredweights = 1 ton
}}</ref>) is a measurement [[Unit of measurement|unit]] equal to {{convert|2,000|lb|kg|2}}. It is commonly used in the [[United States]], where it is known simply as a '''ton''',<ref name=NIST44-C /> although the term is ambiguous, the single word being variously used for short, long, and metric [[ton]].

The various tons are defined as units of mass.<ref>Butcher, Crown and Gentry, NIST Special Publication 1038, The International System of Units (SI) – Conversion Factors for General Use, 2006</ref> They are sometimes used as units of [[weight]], the [[force]] exerted by a mass at standard gravity (e.g., short ton-force). One short ton exerts a weight at one [[standard gravity]] of 2,000 [[pound (force)|pound-force (lbf)]].

==United States==
{{anchor|United States}}
In the [[United States]], a short ton is usually known simply as a "ton",<ref name=NIST44-C/> without distinguishing it from the [[tonne]] ({{convert|1000|kg|lb|2|disp=or}}), known there as the "metric ton", or the [[long ton]] also known as the "imperial ton" ({{convert|2240|lb|kg|2|disp=or}}). There are, however, some U.S. applications where unspecified ''tons'' normally mean long tons (for example, naval ships)<ref name=BTS.GOV>
{{cite web
| url = http://ntl.bts.gov/DOCS/narmain/narmain.html
| title = Naval Architecture for All
| publisher = United States Bureau of Transportation Statistics
| access-date = October 13, 2008
}}
</ref> or metric tons (world grain production figures).

Both the long and short ton are defined as 20 [[hundredweight]]s, but a hundredweight is {{convert|100|lb|kg|2}} in the [[United States customary units|US system]] (short or net hundredweight) and {{convert|112|lb|kg|2}} in the [[Imperial units|imperial system]] (long or gross hundredweight).<ref name=NIST44-C/>

A '''short ton–force''' is {{convert|2000|lb-f|N|2|lk=on}}.

==See also==

*[[Tonnage]], volume measurement used in maritime shipping, originally based on {{convert|100|cuft|5}}.

==References==
{{reflist}}

{{United States Customary Units}}

[[Category:Units of mass]]
[[Category:Customary units of measurement in the United States|Ton, short]]

Short ton - Revision history

Ajay Kumar: Created a new article