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Calorie , a unit of energy or heat variously defined. Since this calorie has been defined in terms of the joule , the definition since being that one calorie is equal to approximately 4. Because the quantity of heat represented by the calorie is known to differ at different temperatures by as much as 1 percent , it has consequently been necessary to define the temperature at which the specific heat of water is to be taken as 1 calorie. It is equal to 4. A unit of heat energy used in thermochemistry is the thermochemical calorie, equal to 4. It is commonly used as the unit for heat capacities, latent heats, and heats of reaction. In a popular use of the term calorie, dietitians loosely use it to mean the kilocalorie , sometimes called the kilogram calorie, or large Calorie equal to 1, calories , in measuring the calorific, heating, or metabolizing value of foods. In other words, if a peach is listed as having 40 Calories, this indicates that that peach has actually 40, calories. In nutrition it has been proposed that the kilojoule replace the kilocalorie as the unit of choice for discussing the energy value of foods. Such a change would bring the nomenclature of food scientists into closer agreement with that of other scientists. The conversion factor for expressing kilocalories as kilojoules, as recommended by the Committee on Nomenclature of the International Union of Nutritional Sciences, is 1 kilocalorie equals 4. Although government publications now often provide energy counts in kilojoules and kilocalories, Calorie is still the most commonly used food energy unit around the world. We welcome suggested improvements to any of our articles. You can make it easier for us to review and, hopefully, publish your contribution by keeping a few points in mind. You may find it helpful to search within the site to see how similar or related subjects are covered. Any text you add should be original, not copied from other sources. At the bottom of the article, feel free to list any sources that support your changes, so that we can fully understand their context. Internet URLs are the best. Your contribution may be further edited by our staff, and its publication is subject to our final approval. Unfortunately, our editorial approach may not be able to accommodate all contributions. Our editors will review what you've submitted, and if it meets our criteria, we'll add it to the article. Please note that our editors may make some formatting changes or correct spelling or grammatical errors, and may also contact you if any clarifications are needed. What are you looking for? Calorie unit of measurement. Learn More in these related articles In the International System of Units SI , Read More heat: Heat as a form of energy Exact relationships exist between the amounts of heat added to or removed from a body and the magnitude of the effects on the state of the body. The two units of heat most commonly used are the calorie and the British thermal unit BTU. The calorie or gram-calorie is the amount of energy required to raise the temperature of one gram of water from Kids Health for Kids Calorie. LiveScience What are Calories? NHS Choices Understanding Calories. Help us improve this article! Contact our editors with your feedback. By far the most widely used material for building the Read this Article the study of computers, including their design architecture and their uses for computations, data processing, and systems control. The field of computer science includes engineering activities such Read this Article device for processing, storing, and displaying information. Computer once meant a person who did computations, but now the term almost universally refers to automated electronic machinery. Read this Article Take this Science True or False Quiz at Encyclopedia Britannica to test your knowledge of geographical facts of science. Take this Quiz a usually four-wheeled vehicle designed primarily for passenger transportation and commonly propelled by an internal-combustion engine using a volatile fuel. Automotive design The modern automobile is Read this Article AI the ability of a digital computer or computer-controlled robot to perform tasks commonly associated with intelligent beings. The term is frequently applied to the project of developing systems endowed Our Days Are Numbered: 7 Crazy Facts About Calendars For thousands of years, we humans have been trying to work out the best way to keep track of our time on Earth. Read this List Take this Measurements Quiz at Enyclopedia Britannica to test your knowledge of distance, shapes, and other mathematical concepts. But future tech may Read this List Take this Mathematics True or False Quiz at Encyclopedia Britannica to test your knowledge of various principles of mathematics and measurement. Take this Quiz TV the electronic delivery of moving images and sound from a source to a receiver. By extending the senses of vision and hearing beyond the limits of physical distance, television has had a considerable You have successfully emailed this. Thank You for Your Contribution! There was a problem with your submission. Please try again later. Select a type Required. Submit Feedback If you prefer to suggest your own revision of the article, you can go to edit mode requires login. Thank you for your feedback.
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