Kilocalories to megajoules converter on this page calculates how many megajoules are in 'X' kilocalories (where 'X' is the number of kilocalories to convert to megajoules). In order to convert a value from kilocalories to megajoules (from kcal to MJ) simply type the number of kcal to be converted to MJ and then click on the 'convert' button.