Electronvolts to Watt-hours Converter

To convert a measurement in electronvolts to watt-hours, multiply the value by 4.450491e-23. The conversion factor comes from the relationship between both units and the joule.

For example, to convert 5 eV to watt-hours: 5 × 4.450491e-23 = 2.225245e-22 Wh.

An electronvolt is the energy gained by one electron moving through a potential difference of one volt, equal to about 1.602 × 10⁻¹⁹ joules. The electronvolt became essential in atomic and particle physics, where joules are impractically large. Particle accelerator energies are expressed in mega-, giga-, and tera-electronvolts.

Common uses of electronvolts include: Atomic and particle physics; Semiconductor band-gap energies; Photon and X-ray energy; Chemistry ionization energies.

A watt-hour is the energy delivered by one watt of power over one hour, equal to 3,600 joules. The watt-hour emerged with the electrical industry as a practical measure of energy use over time. It underpins the kilowatt-hour that appears on electricity bills worldwide.

Common uses of watt-hours include: Battery capacity ratings; Small electronics energy use; Solar panel and storage sizing; Portable power station specifications.

Here are some common values converted:

1 eV = 4.450491e-23 Wh 5 eV = 2.225245e-22 Wh 10 eV = 4.450491e-22 Wh 50 eV = 2.225245e-21 Wh 100 eV = 4.450491e-21 Wh