Convert kilocalorie (IT) to attojoule
Please provide values below to convert kilocalorie (IT) [kcal (IT)] to attojoule [aJ], or Convert attojoule to kilocalorie (IT).
How to Convert Kilocalorie (It) to Attojoule
1 kcal (IT) = 4.1868e+21 aJ
Example: convert 15 kcal (IT) to aJ:
15 kcal (IT) = 15 × 4.1868e+21 aJ = 6.2802e+22 aJ
Kilocalorie (It) to Attojoule Conversion Table
| kilocalorie (IT) | attojoule |
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Kilocalorie (It)
A kilocalorie (kcal) is a unit of energy equal to 1,000 calories, commonly used to measure the energy content of food and beverages.
History/Origin
The kilocalorie originated in the 19th century as a measure of heat energy, primarily used in nutrition and thermodynamics. It became standard in dietary contexts to quantify food energy intake.
Current Use
Today, the kilocalorie is widely used in nutrition to express the energy content of foods and beverages, and in scientific contexts related to energy measurement in biological and physical systems.
Attojoule
An attojoule (aJ) is a unit of energy equal to 10^-18 joules.
History/Origin
The attojoule was introduced as part of the SI prefixes to measure extremely small amounts of energy, particularly in fields like nanotechnology and quantum physics, as the need to quantify very tiny energy scales grew.
Current Use
The attojoule is used in scientific research to measure minute energy quantities, such as in nanotechnology, quantum computing, and molecular biology, where energies involved are extremely small.