| Description: Units_of_Energy is a unit in which energy is measured. |
| | Unit Id |
| | J | J is an abbreviation for joule, which is a unit of energy (in terms of SI base units, 1 joule = 1 kilogram meter squared per second squared = 1 kg m**2 / s**2). |
| | MeV | MeV is an abbreviation for megaelectronvolt, which is a unit of energy (1 MeV = 10**6 eV = one million electronvolts). |
| | eV | eV is an abbreviation for electronvolt, which is a unit of energy (1 eV = 1.602176634 times 10**{-19} J). |
| | keV | keV is an abbreviation for kiloelectronvolt, which is a unit of energy (1 keV = 10**3 eV = one thousand electronvolts). |