Volt to Electron Volt (eV) Calculator

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Forward conversion: enter voltage and charge to get energy. Reverse: enter eV energy and charge to get voltage.
One elementary charge equals the charge of a single proton or electron: 1.602176634 x 10^-19 C.
Electrical potential difference in volts.
V
The quantity of electric charge. In elementary-charge mode this is the number of electrons (or protons). In coulomb mode enter the charge in coulombs.
e
Energy (electron volts)
800eV

Energy transferred by the charge moving through the voltage

Energy (joules)0J
Charge (coulombs)0C
Energy (eV)800
Energy (J)0

800.0000 eV of energy is transferred.

  • 40 electron(s) accelerated through 20 V gains 800.0000 eV of kinetic energy.
  • In SI units that is 1.2817e-16 joules, a tiny amount at the atomic scale but the standard unit in particle and atomic physics.
  • Energies in the eV range are typical of chemical bond energies and visible-light photons.

Next stepUse the reverse mode (eV to V) to find what voltage is needed to give a particle a target energy.

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