About Units

Calories: Calories (cal) are a unit of energy. Specifically, they are defined as the amount of heat needed to raise the temperature of one gram of water by one degree Celsius. In nutrition, calories measure the energy content of food, with 1 food calorie (kcal) being equal to 1,000 small calories.

Btu: British Thermal Units (BTU) are a measure of heat energy. One BTU is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. This unit is commonly used in the power, steam generation, and heating, ventilation, and air conditioning (HVAC) industries.