How to convert electronvolts to kilocalories
To convert a measurement in electronvolts to kilocalories, multiply the value by 3.829294e-23. The conversion factor comes from the relationship between both units and the joule.
For example, to convert 5 eV to kilocalories: 5 × 3.829294e-23 = 1.914647e-22 kcal.
What is a electronvolt?
An electronvolt is the energy gained by one electron moving through a potential difference of one volt, equal to about 1.602 × 10⁻¹⁹ joules. The electronvolt became essential in atomic and particle physics, where joules are impractically large. Particle accelerator energies are expressed in mega-, giga-, and tera-electronvolts.
Common uses of electronvolts include: Atomic and particle physics; Semiconductor band-gap energies; Photon and X-ray energy; Chemistry ionization energies.
What is a kilocalorie?
A kilocalorie equals 1,000 small calories, or exactly 4,184 joules, and is the 'Calorie' shown on food nutrition labels. The food Calorie (capital C) is actually a kilocalorie. This convention, established in nutrition science, means a 500-Calorie meal contains 500 kilocalories, or about 2,092 kilojoules.
Common uses of kilocalories include: Food energy (the dietary 'Calorie'); Metabolism and exercise burn estimates; Nutrition and diet planning; Bomb-calorimetry food testing.
Electronvolts to kilocalories worked examples
Here are some common values converted:
1 eV = 3.829294e-23 kcal 5 eV = 1.914647e-22 kcal 10 eV = 3.829294e-22 kcal 50 eV = 1.914647e-21 kcal 100 eV = 3.829294e-21 kcal
Frequently asked questions
How many kilocalories are in one electronvolt?
One electronvolt (eV) equals 3.829294e-23 kilocalories (kcal). Multiply any value in electronvolts by 3.829294e-23 to convert to kilocalories.
How do I convert electronvolts to kilocalories?
Multiply the value in electronvolts by 3.829294e-23. For example, 5 eV × 3.829294e-23 = 1.914647e-22 kcal.
How do I convert kilocalories to electronvolts?
Multiply the value in kilocalories by 2.611447e+22, or divide by 3.829294e-23. Use the swap button on the converter above to reverse the direction.
Is the electronvolt to kilocalorie conversion exact?
The thermochemical calorie is defined as exactly 4.184 J and the BTU as 1055.056 J. Conversions between SI energy units are exact.
What is the formula for electronvolts to kilocalories?
The formula is: kcal = eV × 3.829294e-23. This comes from the definition of both units relative to the joule.