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