How to use the molar mass from gas density calculator
Find the molar mass of an unknown gas from density. Enter density, temperature, pressure in the fields above; the molar mass is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- rho — Density (g/L)
- T — Temperature (K)
- P — Pressure (kPa)
Worked example
With density = 1.43 g/L, temperature = 273.15 K, pressure = 101.325 kPa, the calculator gives molar mass ≈ 32.05198 g/mol.
Frequently asked questions
What is the formula for the molar mass from gas density calculation?
Molar mass (g/mol) = rho × RGAS × T / P. Here rho is density (g/L), T is temperature (K), P is pressure (kPa).
What inputs do I need for the molar mass from gas density calculator?
You need density in g/L, temperature in K, pressure in kPa. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.