Electronvolts to Joules Converter
Convert electronvolts (eV) to joules (J)
Result
1.6021766 × 10⁻¹⁹ J
Joules
1 eV = 1.6021766 × 10⁻¹⁹ J
1 eV in other units
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How to convert electronvolts to joules
There are 6.241509 × 10¹⁸ electronvolts in one joule, so divide the number of electronvolts by 6.241509 × 10¹⁸.
J = eV ÷ 6.241509 × 10¹⁸
1 eV = 1.602177 × 10⁻¹⁹ J · 1 J = 6.241509 × 10¹⁸ eV
Worked example
To convert 5 electronvolts to joules: 5 eV ÷ 6.241509 × 10¹⁸ = 8.010883 × 10⁻¹⁹ J.
About electronvolts (eV)
An electronvolt is the energy an electron gains across one volt, used in atomic and particle physics.
About joules (J)
The joule is the SI unit of energy: the work done by a force of one newton over one metre.
More conversions
Electronvolts to other units
Frequently asked questions
How many joules are in one electronvolt?
One electronvolt equals 1.602177 × 10⁻¹⁹ joules.
How many electronvolts are in one joule?
One joule equals 6.241509 × 10¹⁸ electronvolts.
How do I convert electronvolts to joules?
Use the formula J = eV ÷ 6.241509 × 10¹⁸. For example, 5 eV ÷ 6.241509 × 10¹⁸ = 8.010883 × 10⁻¹⁹ J.