Definition of Boltzmann's constant in English:

Boltzmann's constant

(also k)


  • The ratio of the gas constant to Avogadro's constant, equal to 1.381 × 10⁻²³ joules per kelvin in the case where the number of molecules is equal to Avogadro's number.

    • ‘The kinetic energy of the outward-moving ions in temperature units may be of the order 100k B, where k B is Boltzmann's constant.’
    • ‘Boltzmann's constant, calculated from the pooled data of several observers, is in excellent agreement with the accepted value.’
    • ‘We see that the temperature of a brick is just the average energy per harmonic oscillator in the brick divided by Boltzmann's constant.’


Boltzmann's constant