joule is a derived unit of energy in the International System of Units.

  • A joule is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre(1 newton/metre or N⋅m).
  • It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second.
  • Where symbol kg is a kilogram, m is a metre, s is a second, N is a newton, Pa is a pascal, W is a watt,  and V is the volt, then the symbol J is for joule.
Electronvolt prefixes
Abbreviated units
Units to Electronvolts
eV to joules (J)
pico-electronvoltpeV1 peV = 1 x 10-12 (eV)
nano-electronvoltneV1 neV = 1 x 10-9 (eV)
micro-electronµeV1 µeV = 0.000001 (eV)
milli-electronvoltmeV1 meV = 0.001 (eV)
electronvolteV1 eV = 1 (eV)
kilo-electronvoltkeV1 keV = 1,000 (eV)
mega-electronvoltMeV1 MeV = 1,000,000 (eV)
giga-electronvoltGeV1 GeV = 1,000,000,000 (eV)1 GeV = 1.60218 x 10-10 (J)
tera-electronvoltTeV1 TeV = 1,000,000,000,000 (eV)1 TeV = 1.60218 x 10-7 (J)
peta-electronvoltPeV1 PeV = 1 x 1015 (eV)1 PeV = 1.60218 x 10-4 (J)
exa-electronvoltEeV1 EeV = 1 x 1018 (eV)1 EeV = 0.160218 (J)