Knowra Calorie Calorie A food-energy unit equal to one kilocalorie, or 1,000 small calories. It is approximately the energy required to raise one kilogram of water by one degree Celsius.
Kilocalorie : A unit of energy equal to 1,000 small calories, commonly used to quantify food energy. Food labels and nutrition discussions use this unit for the energy called a Calorie.
Nutrition facts label : A standardized panel on packaged food that reports nutrients and energy content. Its energy line typically reports Calories per serving.
Thermochemical calorie : A calorie defined as exactly 4.184 joules. This standardized version avoids the small variation in water-based calorie definitions.
Nutrient density : The amount of beneficial nutrients provided relative to a food’s energy content. Equal-calorie foods can differ greatly in vitamins, minerals, fiber, and protein.
Small calorie : A unit of energy equal to the amount needed to heat one gram of water by one degree Celsius. The food Calorie is defined as 1,000 of these smaller units.
Basal metabolic rate : The energy expenditure required to maintain basic bodily functions at rest. Daily calorie needs depend partly on energy used at rest.
International Table calorie : A calorie defined as exactly 4.1868 joules. It is another precise conversion convention used in scientific and engineering contexts.
Empty calories : Calories from foods or drinks that provide little nutritional value beyond energy. The phrase highlights why calorie quantity alone does not describe food quality.
Joule : The SI unit of energy, work, and heat. It provides the standard alternative for expressing the energy measured in Calories.
Total daily energy expenditure : The total energy a person uses in a day, including resting metabolism, activity, and digestion. It is commonly compared with calorie intake when estimating energy balance.
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