Convert Joule to Electronvolt

One J equals 6.241509e+18 eV. This converter allows you to easily convert between Joule and Electronvolt in real time.

Formula

J × 6.241509e+18 = eV

Example: 1 J = 6.241509e+18 eV

What is Joule?

The joule is the SI unit of energy, named after English physicist James Prescott Joule. One joule equals the work done by a force of one newton moving an object one meter, or the energy used by one watt of power for one second. Food energy labels in many countries show kilojoules alongside calories. In physics, the joule unifies mechanical, thermal, and electrical energy into a single consistent unit.

What is Electronvolt?

The electronvolt is a unit of energy widely used in particle physics and quantum mechanics. It equals the energy gained by a single electron accelerating through a potential difference of one volt, approximately 1.602 times 10 to the minus 19 joules. Visible light photons have energies of about 1.8 to 3.1 eV, X-rays range from a few keV to hundreds of keV, and particle accelerators work with energies of GeV to TeV. Semiconductor band gaps are also expressed in eV, with silicon at about 1.12 eV.