Heat units other than the joule
kilocalorie (1 kcal): Amount of heat needed to raise the temperature of one kilogram of water by one Celsius degree: 1 kcal = 4186 joule
Calorie: 1 Calorie = 1000 calories = 1 kcal
Btu (British thermal unit): Amount of heat needed to raise the temperature of one pound of water by one Fahrenheit degree.