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Calories to Electronvolts Converter

Convert calories (thermochemical) (cal) 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 × 10¹⁹ eV
joules (watt-seconds)
4.184 J
kilojoules
0.004184 kJ
megajoules
4.184 × 10⁻⁶ MJ
gigajoules
4.184 × 10⁻⁹ GJ
kilocalories (food Calories)
0.001 kcal
megacalories
1 × 10⁻⁶ Mcal
watt-hours
0.00116222222222 Wh
kilowatt-hours
1.16222222222 × 10⁻⁶ kWh
megawatt-hours
1.16222222222 × 10⁻⁹ MWh
British thermal units (IT)
0.00396566683139 Btu
million Btu
3.96566683139 × 10⁻⁹ MMBtu
therms (100,000 Btu)
3.96566683139 × 10⁻⁸ thm
quads (10¹⁵ Btu)
3.96566683139 × 10⁻¹⁸ quad
kiloelectronvolts
2.61144739675 × 10¹⁶ keV
megaelectronvolts
26,114,473,967,500 MeV

1 cal = 2.61144739675 × 10¹⁹ eV

Show the working
  1. 1 cal = 2.61144739675e19 eV
  2. 1 × 2.61144739675e19 = 2.61144739675e19 eV

How to convert calories to electronvolts

1 cal = 2.61144739675 × 10¹⁹ eV, so multiply by 2.61144739675 to go from calories (thermochemical) to electronvolts. Going the other way, 1 eV = 3.82929405832 × 10⁻²⁰ cal.

eV = cal × 2.61144739675
cal = eV × 3.82929405832

Worked example:

1 cal = 2.61144739675e19 eV
5 × 2.61144739675e19 = 1.30572369838e20 eV

Calories to electronvolts table

CaloriesElectronvolts
1 cal2.61144739675 × 10¹⁹ eV
2 cal5.22289479351 × 10¹⁹ eV
3 cal7.83434219026 × 10¹⁹ eV
4 cal1.0445789587 × 10²⁰ eV
5 cal1.30572369838 × 10²⁰ eV
6 cal1.56686843805 × 10²⁰ eV
7 cal1.82801317773 × 10²⁰ eV
8 cal2.0891579174 × 10²⁰ eV
9 cal2.35030265708 × 10²⁰ eV
10 cal2.61144739675 × 10²⁰ eV
15 cal3.91717109513 × 10²⁰ eV
20 cal5.22289479351 × 10²⁰ eV
25 cal6.52861849189 × 10²⁰ eV
30 cal7.83434219026 × 10²⁰ eV
40 cal1.0445789587 × 10²¹ eV
50 cal1.30572369838 × 10²¹ eV
75 cal1.95858554757 × 10²¹ eV
100 cal2.61144739675 × 10²¹ eV
250 cal6.52861849189 × 10²¹ eV
500 cal1.30572369838 × 10²² eV
1000 cal2.61144739675 × 10²² eV

About the units

Calories (cal)
Calories (thermochemical), a specialised unit. The thermochemical calorie, 4.184 J, used on US food labels as 1 Calorie = 1 kilocalorie. 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