basic

Gas Density Calculator

Ideal-gas density from molar mass, pressure, and temperature.

Compute the density of an ideal gas at given pressure and temperature from its molar mass, using ρ = PM/(RT).

Daniel Oh By Daniel Oh
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Pa
g/mol
K

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

ρ = P · M / (R · T), with R = 8.314 J/(mol·K).

In depth

Compute the density of an ideal gas at given pressure and temperature from its molar mass, using ρ = PM/(RT).