Energy unit conversions Enter a value and the original unit to be converted, and then click on the "Calculation" button for converted values by unit. Enter a value. kilo Joule(kJ) French horsepower-hour(PS・h) kilogram force meter(kgf・m) metric horsepower-hour(HP・h) foot pound force(ft・lbf) kilocalorie(Kcal) kilowatt hour(KW・h) British thermal unit(BTU) *Whenever you change values, be sure to click on the"Calculate"button.