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