An electronvolt (eV) is the energy gained by a single electron accelerating through a potential difference of one volt, widely used in atomic and particle physics.
Electronvolts to Joules
Convert Electronvolt (eV) to Joule (J) instantly with an exact formula, conversion table, and FAQ.
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Convert electronvolts (eV) to joules (J) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
J = eV × 1.602176634e-19
Results update instantly for Electronvolts to Joules conversions.
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Formula
J = eV × 1.602176634e-19
eV = J × 6.241509074e+18
Conversion table
| 1 eV | 1.602177e-19 J |
| 5 eV | 8.010883e-19 J |
| 10 eV | 1.602177e-18 J |
| 20 eV | 3.204353e-18 J |
| 50 eV | 8.010883e-18 J |
| 100 eV | 1.602177e-17 J |
| 500 eV | 8.010883e-17 J |
| 1000 eV | 1.602177e-16 J |
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How the formula works
Both electronvolt and joule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in electronvolts by 1.602176634e-19 to get joules. To reverse the conversion, multiply a joule value by 6.241509074e+18 to get back to electronvolts.
Frequently asked questions
What is Electronvolt (eV)?
An electronvolt (eV) is the energy gained by a single electron accelerating through a potential difference of one volt, widely used in atomic and particle physics.
What is Joule (J)?
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
How do I convert electronvolts to joules?
Multiply the electronvolt value by 1.602176634e-19 to get the equivalent in joules. For example, 5 eV × 1.602176634e-19 = 8.010883e-19 J.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.602176634e-19 is an exact, non-rounded value.
Can I convert joules back to electronvolts?
Yes. Divide the joule value by 1.602176634e-19, or multiply it by 6.241509074e+18, to get electronvolts.
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About converting electronvolts to joules
An electronvolt (eV) is the energy gained by a single electron accelerating through a potential difference of one volt, widely used in atomic and particle physics. The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
Use this calculator to move between electronvolts and joules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.