# Boltzmann constant

The Boltzmann constant is a constant that converts the temperature of a gas (in kelvin) into the kinetic
energy (in joules or electron volts) associated with the thermal motion
of the particles comprising the gas. It equals the molar gas
constant *R* divided by the Avogadro
constant. It is symbolized by *k* and has the value 1.380658
× 10^{-23} joules per kelvin (8.62 × 10^{-5} electronvolts per kelvin). It is named
after the Austrian physicist Ludwig Boltzmann who did important work in statistical
mechanics.

See also Boltzmann equation.