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Kilocalories to Electronvolts Converter

Convert kilocalories (food Calories) (kcal) to electronvolts (eV), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
2.61144739675 × 10²² eV
joules (watt-seconds)
4,184 J
kilojoules
4.184 kJ
megajoules
0.004184 MJ
gigajoules
4.184 × 10⁻⁶ GJ
calories (thermochemical)
1,000 cal
megacalories
0.001 Mcal
watt-hours
1.16222222222 Wh
kilowatt-hours
0.00116222222222 kWh
megawatt-hours
1.16222222222 × 10⁻⁶ MWh
British thermal units (IT)
3.96566683139 Btu
million Btu
3.96566683139 × 10⁻⁶ MMBtu
therms (100,000 Btu)
3.96566683139 × 10⁻⁵ thm
quads (10¹⁵ Btu)
3.96566683139 × 10⁻¹⁵ quad
kiloelectronvolts
2.61144739675 × 10¹⁹ keV
megaelectronvolts
2.61144739675 × 10¹⁶ MeV

1 kcal = 2.61144739675 × 10²² eV

Show the working
  1. 1 kcal = 2.61144739675e22 eV
  2. 1 × 2.61144739675e22 = 2.61144739675e22 eV

How to convert kilocalories to electronvolts

1 kcal = 2.61144739675 × 10²² eV, so multiply by 2.61144739675 to go from kilocalories (food Calories) to electronvolts. Going the other way, 1 eV = 3.82929405832 × 10⁻²³ kcal.

eV = kcal × 2.61144739675
kcal = eV × 3.82929405832

Worked example:

1 kcal = 2.61144739675e22 eV
5 × 2.61144739675e22 = 1.30572369838e23 eV

Kilocalories to electronvolts table

KilocaloriesElectronvolts
1 kcal2.61144739675 × 10²² eV
2 kcal5.22289479351 × 10²² eV
3 kcal7.83434219026 × 10²² eV
4 kcal1.0445789587 × 10²³ eV
5 kcal1.30572369838 × 10²³ eV
6 kcal1.56686843805 × 10²³ eV
7 kcal1.82801317773 × 10²³ eV
8 kcal2.0891579174 × 10²³ eV
9 kcal2.35030265708 × 10²³ eV
10 kcal2.61144739675 × 10²³ eV
15 kcal3.91717109513 × 10²³ eV
20 kcal5.22289479351 × 10²³ eV
25 kcal6.52861849189 × 10²³ eV
30 kcal7.83434219026 × 10²³ eV
40 kcal1.0445789587 × 10²⁴ eV
50 kcal1.30572369838 × 10²⁴ eV
75 kcal1.95858554757 × 10²⁴ eV
100 kcal2.61144739675 × 10²⁴ eV
250 kcal6.52861849189 × 10²⁴ eV
500 kcal1.30572369838 × 10²⁵ eV
1000 kcal2.61144739675 × 10²⁵ eV

About the units

Kilocalories (kcal)
Kilocalories (food Calories), a specialised unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.
Electronvolts (eV)
Electronvolts, a specialised unit. Definition: NIST CODATA: elementary charge (exact since the 2019 SI redefinition).

Formula version 0.1.0Reviewed