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.
Millijoules to Electronvolts
Convert Millijoule (mJ) to Electronvolt (eV) instantly with an exact formula, conversion table, and FAQ.
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Convert millijoules (mJ) to electronvolts (eV) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
eV = mJ × 6.241509074e+15
Results update instantly for Millijoules to Electronvolts conversions.
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Formula
eV = mJ × 6.241509074e+15
mJ = eV × 1.602176634e-16
Conversion table
| 1 mJ | 6.241509e+15 eV |
| 5 mJ | 3.120755e+16 eV |
| 10 mJ | 6.241509e+16 eV |
| 20 mJ | 1.248302e+17 eV |
| 50 mJ | 3.120755e+17 eV |
| 100 mJ | 6.241509e+17 eV |
| 500 mJ | 3.120755e+18 eV |
| 1000 mJ | 6.241509e+18 eV |
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How the formula works
Both millijoule and electronvolt measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in millijoules by 6.241509074e+15 to get electronvolts. To reverse the conversion, multiply a electronvolt value by 1.602176634e-16 to get back to millijoules.
Frequently asked questions
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.
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.
How do I convert millijoules to electronvolts?
Multiply the millijoule value by 6.241509074e+15 to get the equivalent in electronvolts. For example, 5 mJ × 6.241509074e+15 = 3.120755e+16 eV.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 6.241509074e+15 is an exact, non-rounded value.
Can I convert electronvolts back to millijoules?
Yes. Divide the electronvolt value by 6.241509074e+15, or multiply it by 1.602176634e-16, to get millijoules.
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About converting millijoules to electronvolts
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. 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.
Use this calculator to move between millijoules and electronvolts accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.