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Easily convert Calorie (cal) to British Thermal Unit (BTU) in the Energy category with ConvertOnline's efficient tool.
The calorie (cal) is a unit of energy commonly used to measure the energy content of foods and the energy expenditure of physical activities. It is defined as the amount of energy needed to raise the temperature of one gram of water by one degree Celsius at standard atmospheric pressure.
The British Thermal Unit (BTU) is a measure of heat energy. It is defined as the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit at a constant pressure.