Joules to Electronvolts Converter
Convert joules (J) to electronvolts (eV)
Result
6.2415091 × 10¹⁸ eV
Electronvolts
1 J = 6.2415091 × 10¹⁸ eV
1 J in other units
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How to convert joules to electronvolts
One joule equals 6.241509 × 10¹⁸ electronvolts, so multiply the number of joules by 6.241509 × 10¹⁸.
eV = J × 6.241509 × 10¹⁸
1 J = 6.241509 × 10¹⁸ eV · 1 eV = 1.602177 × 10⁻¹⁹ J
Worked example
To convert 5 joules to electronvolts: 5 J × 6.241509 × 10¹⁸ = 3.120755 × 10¹⁹ eV.
About joules (J)
The joule is the SI unit of energy: the work done by a force of one newton over one metre.
About electronvolts (eV)
An electronvolt is the energy an electron gains across one volt, used in atomic and particle physics.
More conversions
Joules to other units
Frequently asked questions
How many electronvolts are in one joule?
One joule equals 6.241509 × 10¹⁸ electronvolts.
How many joules are in one electronvolt?
One electronvolt equals 1.602177 × 10⁻¹⁹ joules.
How do I convert joules to electronvolts?
Use the formula eV = J × 6.241509 × 10¹⁸. For example, 5 J × 6.241509 × 10¹⁸ = 3.120755 × 10¹⁹ eV.