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Physics

Ideal Gas Density Calculator

Find ideal-gas density using molar mass.

SI units shown beside each fieldIdeal model explained below

Physical quantities

Runs on your device

CALCULATED QUANTITY

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter absolute pressure, molar mass, temperature.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Density = pressure × molar mass/(R × temperature). R = 8.31446261815324.

A WORKED EXAMPLE

Using absolute pressure = 101325 Pa, molar mass = 0.02897 kg/mol, temperature = 298.15 K, the result is 1.18412107 kg/m³. Change these example inputs to match your task; use the method above to check each step.

What to keep in mind

An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.

Common questions

Which inputs does this calculation need?

Find ideal-gas density using molar mass. Enter absolute pressure in Pa, molar mass in kg/mol, temperature in K. The filled example is editable and is not a saved personal record.

How should I interpret the result?

An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.

Methodology maintained by ClarityKit. How these tools are built and checked.