What is the measure of a quantity of energy

The quantities of energy in one unit can always be transformed into any other unit of energy like one gram calorie is equal to 4.186 joules that are, used to determine heat energy. Most of the individuals know about kilogram calories that are usually used to determine the energy accessible in food. 1 calorie refers to the concentration of energy required to elevate the temperature of 1 kg of water by 1 degree C.