Joules to Electronvolts Conversion

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
Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert Joules to Electronvolts

To convert a joule measurement to an electronvolt measurement, multiply the energy by the conversion ratio.

Since one joule is equal to 6.2415E+18 electronvolts, you can 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

How Many Electronvolts are in a Joule?

There are 6.2415E+18 electronvolts in a joule, which is why we use this value in the formula above.

1 J = 6.2415E+18 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.[1] 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 to Electronvolt Conversion Table

Joule measurements converted to electronvolts
Joules Electronvolts
0.000000000000000001 J 6.2415 eV
0.000000000000000002 J 12.48 eV
0.000000000000000003 J 18.72 eV
0.000000000000000004 J 24.97 eV
0.000000000000000005 J 31.21 eV
0.000000000000000006 J 37.45 eV
0.000000000000000007 J 43.69 eV
0.000000000000000008 J 49.93 eV
0.000000000000000009 J 56.17 eV
0.0000000000000000001 J 0.624151 eV
0.000000000000000001 J 6.2415 eV
0.00000000000000001 J 62.42 eV
0.0000000000000001 J 624.15 eV
0.000000000000001 J 6,242 eV
0.00000000000001 J 62,415 eV
0.0000000000001 J 624,151 eV
0.000000000001 J 6,241,509 eV
0.00000000001 J 62,415,093 eV
0.0000000001 J 624,150,934 eV
0.000000001 J 6,241,509,343 eV
0.00000001 J 62,415,093,433 eV
0.0000001 J 624,150,934,326 eV
0.000001 J 6,241,509,343,260 eV
0.00001 J 62,415,093,432,602 eV
0.0001 J 624,150,000,000,000 eV
0.001 J 6,241,500,000,000,000 eV
0.01 J 62,415,000,000,000,000 eV
0.1 J 624,150,000,000,000,000 eV
1 J 6,241,500,000,000,000,000 eV


  1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019,