Therm
The therm is a unit of heat energy used in the United States and the United Kingdom for measuring natural gas consumption.
Calories (Kilogram,thermoc.)
The kilogram calorie (also called the large calorie, food calorie or kilocalorie) is the energy needed to warm one kilogram of water by one degree Celsius, which is 4,184 joules in the thermochemical version. It is the calorie printed on food labels.