Electronvolt ($\mathrm{eV}$)

An electronvolt (eV) is a unit of energy commonly used in the fields of particle physics, nuclear physics, and quantum mechanics. It is defined as the amount of kinetic energy gained or lost by an electron when it is accelerated through an electric potential difference of one volt. 1 eV is equivalent to approximately \(1.602 \times 10^{-19}\) joules.

After the 2019 redefinition of the SI base units it is by definition exactly $1.60217663410^{-19}$ Joules.