No, it measures the ammount of heat output that would heat a millilitre of water 1 degree Celsius. So if you were to burn 1000 calories of energy, it would heat one millilitre 1000 degrees Celsius or it would heat 1 litre 1 degree Celsius.
The calorie is used for heat, 1 calorie heats 1 gram of water by 1 degC. The Joule is used for mechanical energy, but there is a fixed relation, 1 calorie = 4.2 Joules
the calorie
the measure of energy from food
calorie
A calorie
A calorie is a measure of energy. It doesn't make sense to ask how much energy you need to lose energy.
Nutrient Density
A calorie, by definition, is the amount of energy it takes to raise 1 gram of water 1 degree celsius. It is a measure of heat energy. To people, calories are found in foods and drinks, which give us energy. Each calorie is like a measure of potential energy we can then use. Living and exercising thus "burns" calories as we use up the energy we have consumed.
A calorie is a unit of measure for the potenetial energy stored inside of a molecule, or a measure of the amount of energy it takes to raise one gram of water 1 degree celsius.
The large calorie, kilogram calorie, dietary calorie or food calorie approximates the energy needed to increase the temperature of 1 kilogram of water by 1 °C.
the measure of energy the body is able to produce from food
The calorie (usually expressed in kilocalories)