Gas Density Calculator
Calculate ideal gas density from pressure, molar mass, and temperature.
Gas Density measurements
Enter your values, then calculate.
Result
How to calculate gas density
This calculator finds gas density using the ideal gas law, from pressure, molar mass, and temperature.
How the calculation works
Density = (Pressure × Molar mass) ÷ (0.082057 × Temperature), where 0.082057 is the ideal gas constant in L·atm/(mol·K).
Example
1 atm, 28.97 g/mol (air), 298 K: (1×28.97)÷(0.082057×298) ≈ 1.185 g/L.
Frequently asked questions
How is Result calculated?
Result = [Pressure] × [Molar mass] ÷ (0.0821 × [Temperature]).
Is the Gas Density Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Gas Density Calculator
Density = (Pressure × Molar mass) ÷ (0.082057 × Temperature), where 0.082057 is the ideal gas constant in L·atm/(mol·K).
Let's understand your gas density result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Gas Density
- Temperature must be in Kelvin for this formula to work correctly.
- This assumes ideal gas behavior, which is a good approximation for many gases at normal conditions but breaks down at very high pressure or low temperature.
Common Gas Density Mistakes to Avoid
- Using Celsius instead of Kelvin for temperature, which would produce an incorrect density.
When to Use This Calculator
This calculator finds gas density using the ideal gas law, from pressure, molar mass, and temperature.