Convert Joules to Electronvolts

Enter the energy in joules below to get the value converted to electronvolts.

Results in Electronvolts:
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1 J = 6.2415E+18 eV

How to Convert Joules to Electronvolts

To convert a joule measurement to an electronvolt measurement, multiply the energy by the conversion ratio. One joule is equal to 6.2415E+18 electronvolts, so use this simple formula to convert:

electronvolts = joules × 6.2415E+18

The energy in electronvolts is equal to the joules multiplied by 6.2415E+18.

For example, here's how to convert 5 joules to electronvolts using the formula above.
5 J = (5 × 6.2415E+18) = 3.1208E+19 eV

Joules and electronvolts are both units used to measure energy. Keep reading to learn more about each unit of measure.


The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J, for example 1 joule can be written as 1 J.


The electronvolt is a unit of energy used in physics, most commonly in electrostatic particle accelerator sciences.

Electronvolts can be abbreviated as eV, for example 1 electronvolt can be written as 1 eV.

Energy in electronvolts can be expressed using the following formula: E = qV

The energy E in electronvolts is equal to the electric charge q in elementary charge times the potential difference V in volts.

Joule Measurements and Equivalent Electronvolt Conversions

Common joule values converted to the equivalent electronvolt value
Joules Electronvolts
1 J 6,241,500,000,000,000,000 eV
2 J 12,483,000,000,000,000,000 eV
3 J 18,725,000,000,000,000,000 eV
4 J 24,966,000,000,000,000,000 eV
5 J 31,208,000,000,000,000,000 eV
6 J 37,449,000,000,000,000,000 eV
7 J 43,691,000,000,000,000,000 eV
8 J 49,932,000,000,000,000,000 eV
9 J 56,174,000,000,000,000,000 eV
10 J 62,415,000,000,000,000,000 eV
11 J 68,657,000,000,000,000,000 eV
12 J 74,898,000,000,000,000,000 eV
13 J 81,140,000,000,000,000,000 eV
14 J 87,381,000,000,000,000,000 eV
15 J 93,623,000,000,000,000,000 eV
16 J 99,864,000,000,000,000,000 eV
17 J 106,110,000,000,000,000,000 eV
18 J 112,350,000,000,000,000,000 eV
19 J 118,590,000,000,000,000,000 eV
20 J 124,830,000,000,000,000,000 eV
21 J 131,070,000,000,000,000,000 eV
22 J 137,310,000,000,000,000,000 eV
23 J 143,550,000,000,000,000,000 eV
24 J 149,800,000,000,000,000,000 eV
25 J 156,040,000,000,000,000,000 eV
26 J 162,280,000,000,000,000,000 eV
27 J 168,520,000,000,000,000,000 eV
28 J 174,760,000,000,000,000,000 eV
29 J 181,000,000,000,000,000,000 eV
30 J 187,250,000,000,000,000,000 eV
31 J 193,490,000,000,000,000,000 eV
32 J 199,730,000,000,000,000,000 eV
33 J 205,970,000,000,000,000,000 eV
34 J 212,210,000,000,000,000,000 eV
35 J 218,450,000,000,000,000,000 eV
36 J 224,690,000,000,000,000,000 eV
37 J 230,940,000,000,000,000,000 eV
38 J 237,180,000,000,000,000,000 eV
39 J 243,420,000,000,000,000,000 eV
40 J 249,660,000,000,000,000,000 eV

More Joule Energy Conversions

Convert to Kilojoules
1 J is equal to 0.001 kilojoules
Convert to Megajoules
1 J is equal to 1.0E-6 megajoules
Convert to Gigajoules
1 J is equal to 1.0E-9 gigajoules
Convert to Calories
1 J is equal to 0.239006 calories
Convert to Kilocalories
1 J is equal to 0.000239 kilocalories
Convert to Megacalories
1 J is equal to 2.3901E-7 megacalories
Watts x Time
Convert to Watt-hours
1 J is equal to 0.000278 watt-hours
Convert to Kilowatt-hours
1 J is equal to 2.7778E-7 kilowatt-hours
Convert to Megawatt-hours
1 J is equal to 2.7778E-10 megawatt-hours
Convert to Watt-seconds
1 J is equal to 1 watt-seconds
Thermal Units
Convert to British Thermal Units
1 J is equal to 0.000948 british thermal units
Convert to Million BTU
1 J is equal to 9.4782E-10 million BTU
Convert to Therms
1 J is equal to 9.4782E-9 therms
Convert to Quads
1 J is equal to 9.4782E-19 quads
Convert to Kiloelectronvolts
1 J is equal to 6,241,500,000,000,000 kiloelectronvolts
Convert to Megaelectronvolts
1 J is equal to 6,241,509,343,260.2 megaelectronvolts