What is calorific value ? Share with your friends Share 6 Kranav Sharma answered this Calorific value is the amount of heat energy released during complete combustion of 1 Kg of a fuel.It is expressed in Kilo Joule per Kg (KJ/Kg). 31 View Full Answer Ritik Gupta answered this The Calorific Value is the amount of heat obtained from it when a unit mass of tiis fuel is completely burnt out under ideal conditions. -4 Nirmit Shah answered this The Calorific Value is the amount of heat obtained from it when a unit mass of tiis fuel is completely burnt out under ideal conditions. 3