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 Kilojoules
Convert Electronvolt (eV) to Kilojoule (kJ) instantly with an exact formula, conversion table, and FAQ.
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Convert electronvolts (eV) to kilojoules (kJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
kJ = eV × 1.602176634e-22
Results update instantly for Electronvolts to Kilojoules conversions.
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Formula
kJ = eV × 1.602176634e-22
eV = kJ × 6.241509074e+21
Conversion table
| 1 eV | 1.602177e-22 kJ |
| 5 eV | 8.010883e-22 kJ |
| 10 eV | 1.602177e-21 kJ |
| 20 eV | 3.204353e-21 kJ |
| 50 eV | 8.010883e-21 kJ |
| 100 eV | 1.602177e-20 kJ |
| 500 eV | 8.010883e-20 kJ |
| 1000 eV | 1.602177e-19 kJ |
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How the formula works
Both electronvolt and kilojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in electronvolts by 1.602176634e-22 to get kilojoules. To reverse the conversion, multiply a kilojoule value by 6.241509074e+21 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 Kilojoule (kJ)?
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
How do I convert electronvolts to kilojoules?
Multiply the electronvolt value by 1.602176634e-22 to get the equivalent in kilojoules. For example, 5 eV × 1.602176634e-22 = 8.010883e-22 kJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.602176634e-22 is an exact, non-rounded value.
Can I convert kilojoules back to electronvolts?
Yes. Divide the kilojoule value by 1.602176634e-22, or multiply it by 6.241509074e+21, to get electronvolts.
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About converting electronvolts to kilojoules
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. A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
Use this calculator to move between electronvolts and kilojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.