Liter-atmosphere to kilojoules conversion calculator shown above calculates how many kilojoules are in 'X' liter-atmosphere (where 'X' is the number of liter-atmosphere to convert to kilojoules). In order to convert a value from liter-atmosphere to kilojoules (from L atm to kJ) simply type the number of L atm to be converted to kJ and then click on the 'convert' button.