Kilocalories to Electronvolts Converter

To convert a measurement in kilocalories to electronvolts, multiply the value by 2.611447e+22. The conversion factor comes from the relationship between both units and the joule.

For example, to convert 5 kcal to electronvolts: 5 × 2.611447e+22 = 1.305724e+23 eV.

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.

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.

Here are some common values converted:

1 kcal = 2.611447e+22 eV 5 kcal = 1.305724e+23 eV 10 kcal = 2.611447e+23 eV 50 kcal = 1.305724e+24 eV 100 kcal = 2.611447e+24 eV