The value of Boltzmann constant (k) is

$1.38\times {10}^{-23}\mathrm{J}{\mathrm{K}}^{-1}$${\mathrm{molecule}}^{\mathrm{-1}}$

$1.38\times {10}^{-23}\mathrm{erg}{\mathrm{K}}^{-1}$${\mathrm{molecule}}^{\mathrm{-1}}$

$1.38\times {10}^{-16}\mathrm{J}{\mathrm{K}}^{-1}$${\mathrm{molecule}}^{-1}$

$1.38\times {10}^{-27}\mathrm{cal}{\mathrm{K}}^{-1}{\mathrm{mol}}^{-1}$