Gaz Yakitlar...................................kJ/m3.............m3/20000kJ Dogal gaz........................................30000.............0,67 Copluk gazi.....................................19000..............1,05 Kanalizasyon gazi...........................25000..............0,80 Sivi Yakitlar.....................................kJ/kg................kg/20000kJ Petrol...............................................19300...............1,04 Benzin..............................................54000...............0,37 Gazyagi............................................58000...............0,34 No.2 Yag..........................................60000...............0,33 No.6 Yag..........................................66000................0,30 Butan...............................................45000................0,44 Propan.............................................39400................0,51 Kati Yakitlar Antrasit............................................33000...................