Use this free Molar Mass of Gas Calculator to quickly determine the molecular weight of any gas. Input the gas's mass, pressure, volume, and temperature to get instant, accurate results for your chemistry calculations and experiments.
Formula:
The Molar Mass (M) of a gas is calculated using a rearranged form of the Ideal Gas Law:
M = mRT / PV
- M = Molar Mass (g/mol)
- m = Mass of gas (g)
- R = Ideal Gas Constant (0.08206 L·atm/(mol·K))
- T = Absolute Temperature (K)
- P = Pressure of gas (atm)
- V = Volume of gas (L)