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energy · International · Modern / historical

electronvolt

eVexact
Record
M328
Definition quality
Standardized
Conversion mode
multiplicative
Calculator
Fully calculable

Etymology/person-name origin not separately researched unless stated by standards history; current definition/conversion resolved.

Definition

Non-SI unit accepted for use with the SI; 1 eV = exactly 1.602176634×10⁻¹⁹ J.

Reference value

One electronvolt is equal to 1.602177 × 10^-19 joules.

History & use

The electronvolt is retained for scientific use and is explicitly accepted for use with the SI.

Modern use

Widely used in atomic, nuclear, particle, and related physics.

Did you know?

It is the kinetic energy acquired by an electron passing through a potential difference of one volt in vacuum; SI prefixes are often used with it.

Sources & evidence

Source tier Tier A · confidence High

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