Calorie is a unit of energy, which can be applied to any substance containing energy.

Simply put, the energy or heat of 1 calorie can raise the temperature of 1 gram of water by 1 degree Celsius at one atmospheric pressure. 1 calorie is about 4. 1859 Joule (Joule is a commonly used unit of energy in physics).

Unit conversion:

1 kcal = 4.184 KJ.

1 kilojoule (KJ)=0.239 KCAL.

1 card =4. 184 joules.

1 joule =0.239 calories.