Molar Mass of A Gas Calculator

Formula = 0.0821 * P * V * W / T

Enter the volume of a gas (V) = Cm3
Enter the mass of a gas (W) = g
Enter the temperature (T) = Celsius
Enter the pressure of a gas (P) = atm

Molar mass of a gas =


Molar Mass Of a Gas Calculator is a free online tool that displays the molar mass of a gas for the given inputs. BYJU’S online Molar mass of a gas calculator tool makes the calculation faster, and it shows the result in a fraction of seconds.

How to Use the Molar Mass Of a Gas Calculator?

The procedure to use the molar mass of a gas calculator is as follows:
Step 1: Enter the volume, mass of a gas, temperature and pressure of a gas in the respective input fields
Step 2: Now click the button “Calculate Molar Mass” to get the output
Step 3: Finally, the value of molar mass of a gas will be displayed in the output field

What is Meant by the Molar Mass of a Gas?

In chemistry, the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles. The molar mass of a particular gas is equal to the mass of a single particle of that gas multiplied by Avogadro’s number, i.e. 6.02 x 1023. Otherwise, the formula given for finding the molar mass of a gas is:
Molar mass of a gas = (0.0821 × PVW)/T
P = Pressure of the gas
V = Volume of the gas
W = Mass of a gas
T = Temperature


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  1. What is molar mass of the gas

    • Relative molar mass is defined as the smallest mass unit of a compound with one twelfth of the mass of one carbon – 12 atom.