'''Ton panjang''' (L/T), atau sering disebut dengan '''ton Britania''' atau '''ton Imperial''', adalah satuan [[massa]] yang samakira-kira dengansebesar {{convert|2240|lb|kg|abbr=off|order=flip}}.{{efn|The "pound" used in this article is the [[avoirdupois pound]]. Its mass [[International yard and pound|is defined]] as exactly 0.45359237 kg }}<ref>{{cite web| url = http://www.opsi.gov.uk/acts/acts1985/pdf/ukpga_19850072_en.pdf| title = Weights and Measures Act 1985| accessdate = 2010-02-03| date = 1985-10-30| publisher = Her Majesty's Stationery Office| url-status = live| archiveurl = https://web.archive.org/web/20091208083258/http://www.opsi.gov.uk/acts/acts1985/pdf/ukpga_19850072_en.pdf| archivedate = 2009-12-08}}</ref>
