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 Millijoules
Convert Electronvolt (eV) to Millijoule (mJ) instantly with an exact formula, conversion table, and FAQ.
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Convert electronvolts (eV) to millijoules (mJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
mJ = eV × 1.602176634e-16
Results update instantly for Electronvolts to Millijoules conversions.
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Formula
mJ = eV × 1.602176634e-16
eV = mJ × 6.241509074e+15
Conversion table
| 1 eV | 1.602177e-16 mJ |
| 5 eV | 8.010883e-16 mJ |
| 10 eV | 1.602177e-15 mJ |
| 20 eV | 3.204353e-15 mJ |
| 50 eV | 8.010883e-15 mJ |
| 100 eV | 1.602177e-14 mJ |
| 500 eV | 8.010883e-14 mJ |
| 1000 eV | 1.602177e-13 mJ |
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How the formula works
Both electronvolt and millijoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in electronvolts by 1.602176634e-16 to get millijoules. To reverse the conversion, multiply a millijoule value by 6.241509074e+15 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 Millijoule (mJ)?
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
How do I convert electronvolts to millijoules?
Multiply the electronvolt value by 1.602176634e-16 to get the equivalent in millijoules. For example, 5 eV × 1.602176634e-16 = 8.010883e-16 mJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.602176634e-16 is an exact, non-rounded value.
Can I convert millijoules back to electronvolts?
Yes. Divide the millijoule value by 1.602176634e-16, or multiply it by 6.241509074e+15, to get electronvolts.
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About converting electronvolts to millijoules
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 millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
Use this calculator to move between electronvolts and millijoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.