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 Megajoules
Convert Electronvolt (eV) to Megajoule (MJ) instantly with an exact formula, conversion table, and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Energy calculator
Energy Converter
Convert electronvolts (eV) to megajoules (MJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
MJ = eV × 1.602176634e-25
Results update instantly for Electronvolts to Megajoules conversions.
Reserved above the conversion cards and below the converter.
Formula
MJ = eV × 1.602176634e-25
eV = MJ × 6.241509074e+24
Conversion table
| 1 eV | 1.602177e-25 MJ |
| 5 eV | 8.010883e-25 MJ |
| 10 eV | 1.602177e-24 MJ |
| 20 eV | 3.204353e-24 MJ |
| 50 eV | 8.010883e-24 MJ |
| 100 eV | 1.602177e-23 MJ |
| 500 eV | 8.010883e-23 MJ |
| 1000 eV | 1.602177e-22 MJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both electronvolt and megajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in electronvolts by 1.602176634e-25 to get megajoules. To reverse the conversion, multiply a megajoule value by 6.241509074e+24 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 Megajoule (MJ)?
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
How do I convert electronvolts to megajoules?
Multiply the electronvolt value by 1.602176634e-25 to get the equivalent in megajoules. For example, 5 eV × 1.602176634e-25 = 8.010883e-25 MJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.602176634e-25 is an exact, non-rounded value.
Can I convert megajoules back to electronvolts?
Yes. Divide the megajoule value by 1.602176634e-25, or multiply it by 6.241509074e+24, to get electronvolts.
Reserved between the FAQ and the article so the page stays balanced.
About converting electronvolts to megajoules
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 megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
Use this calculator to move between electronvolts and megajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.