Ideal Gas Density Calculator
Calculate gas density from pressure, molar mass, and temperature.
How to Use This Calculator
1
Enter p, M, T
Use SI units: Pa, kg/mol, K.
2
Calculate ρ
Get density in kg/m³.
Formula
ρ = (p × M) / (R × T)
Example: Air at 101325 Pa, M=0.02897 kg/mol, T=298 K → ρ≈1.185 kg/m³
About Ideal Gas Density
Relates macroscopic pressure and temperature to mass density using the ideal gas model.
Frequently Asked Questions
What M to use?
M is molar mass in kg/mol (e.g., dry air ≈ 0.02897 kg/mol).
Can I input kPa?
Yes, convert to Pa by multiplying by 1000.