Editing Tonne (section)

==Conversions==
One tonne is equivalent to:
*{{val|1000|u=[[kilogram]]s&nbsp;(kg)}} by definition.<ref>{{SIbrochure9th}}</ref>
*{{val|1000000|u=[[gram]]s&nbsp;(g)}} or 1 megagram (Mg). Megagram is the corresponding official SI unit with the same mass. Mg is distinct from mg, milligram.
*In [[Pound (mass)|pounds]]: Exactly {{sfrac|1000|0.453{{thin space}}592{{thin space}}37}} pounds (lb) by definition of the pound,<ref name=nbs447>{{Cite book | title=Weights and measures standards of the United States – A brief history | year=1976 | url=http://physics.nist.gov/Pubs/SP447/contents.html | first=L.E. | last=Barbrow | author2=Judson, L.V. | url-status=dead | archive-url=https://web.archive.org/web/20080511153143/http://physics.nist.gov/Pubs/SP447/contents.html | archive-date=2008-05-11 }}</ref> or approximately {{val|2204.622622|u=lb}}.<!-- By calculation--><ref name=NGS>{{cite web | url= http://www.ngs.noaa.gov/PUBS_LIB/FedRegister/FRdoc59-5442.pdf  | author        = United States National Bureau of Standards  | title= Notices "Refinement of values for the yard and the pound" | date= 1959-06-25 | access-date= 2006-08-12}}</ref>
*In [[short ton]]s: Exactly {{sfrac|1|0.907{{thin space}}184{{thin space}}74}}&nbsp;short&nbsp;tons (tn), or approximately {{val|1.102311311}}&nbsp;tn.<!-- By calculation-->
**One short ton is exactly {{val|0.90718474|u=t}}.<ref name="NISTUnits">National Institute of Standards and Technology. {{cite book |date=October 2013 |chapter=Appendix C – General Tables of Units of Measurement |chapter-url=https://www.nist.gov/pml/wmd/pubs/upload/appc-14-hb44-final.pdf |editor1-last=Butcher |editor1-first=Tina |editor2-last=Crown |editor2-first=Linda |editor3-last=Harshman |editor3-first=Rick |editor4-last=Williams |editor4-first=Juana  |title=Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices |url=https://www.nist.gov/pml/wmd/pubs/hb44-14.cfm |series=NIST Handbook |volume=44 |edition=2014 |location=Washington, D.C. |publisher=U.S. Department of Commerce, Technology Administration, National Institute of Standards and Technology |page=C-13 |issn=0271-4027 |oclc=58927093 |access-date=10 December 2013}}</ref>
*In [[long ton]]s: Exactly {{sfrac|1|1.016{{thin space}}046{{thin space}}9088}}&nbsp;long&nbsp;tons (LT), or approximately {{val|0.9842065276}}&nbsp;LT.<!-- By calculation-->
**One long ton is exactly {{val|1.0160469088|u=t}}.<ref name="NISTUnits" />

A tonne is the mass of one [[cubic metre]] of pure water at {{convert|4|C}}.{{efn|To within 0.003%.}}