Constants & Units · constant
Molar gas constant
R = 8.314 462 618… J mol⁻¹ K⁻¹
- Unit
- J mol⁻¹ K⁻¹
- Value
- 8.314 462 618…
- Exact
- yes
- Note
- Boltzmann's constant per mole. The R in pV = nRT, Arrhenius, van 't Hoff, and Nernst.
- Symbol
- R
- Category
- Thermodynamic
- Numeric
- 8.314462618
- Uncertainty
- exact (N_A·k_B)
Open on the Constants & Units shelf — the interactive card, the filters, and everything alongside it.