Inch-pounds force to kilojoules converter above calculates how many kilojoules are in 'X' inch-pounds force (where 'X' is the number of inch-pounds force to convert to kilojoules). In order to convert a value from inch-pounds force to kilojoules (from in lbf to kJ) simply type the number of in lbf to be converted to kJ and then click on the 'convert' button.