British and US units


Energy units

Unit Symbol SI equivalent Conversion Factor
British thermal unit Btu, BTU 4.186 J 0.23889
foot-pound-weight ft lb wt 1.35582 J 0.73756
foot-pound-force ft Lb, ft lbf 1.35582 J 0.73756
horse-power hour hph, HPhr 2.68452 MJ 0.372506



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