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