The joule (J) is the unit of energy, work, and heat in the International System of Units (SI).
- The joule (J) is the unit of energy, work, and heat in the International System of Units (SI).
- One joule is equal to the amount of work done when a force of one newton displaces an object by one meter in the direction of that force.
- It can also be defined as the amount of energy dissipated as heat when an electric current of one ampere flows through a resistance of one ohm for one second.
- While joules are a fundamental unit, they are a relatively small unit of energy. Therefore, larger units like kilojoules (kJ) or megajoules (MJ) are often used for practical applications.
Electronvolt prefixes | Abbreviated units | Units to Electronvolts | eV to joules (J) |
|---|---|---|---|
| pico-electronvolt | peV | 1 peV = 1 x 10-12 (eV) | |
| nano-electronvolt | neV | 1 neV = 1 x 10-9 (eV) | |
| micro-electron | µeV | 1 µeV = 0.000001 (eV) | |
| milli-electronvolt | meV | 1 meV = 0.001 (eV) | |
| electronvolt | eV | 1 eV = 1 (eV) | |
| kilo-electronvolt | keV | 1 keV = 1,000 (eV) | |
| mega-electronvolt | MeV | 1 MeV = 1,000,000 (eV) | |
| giga-electronvolt | GeV | 1 GeV = 1,000,000,000 (eV) | 1 GeV = 1.60218 x 10-10 (J) |
| tera-electronvolt | TeV | 1 TeV = 1,000,000,000,000 (eV) | 1 TeV = 1.60218 x 10-7 (J) |
| peta-electronvolt | PeV | 1 PeV = 1 x 1015 (eV) | 1 PeV = 1.60218 x 10-4 (J) |
| exa-electronvolt | EeV | 1 EeV = 1 x 1018 (eV) | 1 EeV = 0.160218 (J) |