Conversion Factors for Units of Calorific Value

Metric Units British Unit
Joule per gram
(J/g)		 Kilocalorie per kilogram
(kcal/kg)		 British thermal unit per pound
(BTh U/lb)
1 Joule per gram
(J/g)
 1 0.238 846 0.429 923
 
1 Kilocalorie per kilogram
(kcal/kg)
 4.1868 1 1.8
 
1 British thermal unit per pound
(BTh U/lb)
 2.326 0.555 56 1