The Universal Gas Constant

R = \frac{p \cdot V}{\nu \cdot T}= 8,314 J/(\textup{mol} \cdot \textup K)

1 J (Joule) = 1 Nm = 1 Ws

For calculations, the following, equivalent values are often used:

R = 83,14 \, mbar \cdot  l / mol \cdot K

R = 8,314 \cdot 10^{4} \, mbar \cdot l / kmol \cdot K

R = 8,314 \cdot 10^{3} \, Pa\:m^3 / kmol \cdot K