Ideal Gas Pressure Calculator
Estimate pressure using the ideal gas law.
Use more precise models for high pressures or low temperatures.
Examples
- 1 mol at 300K in 24L ⇒ 1.03 atm
- 2 mol at 350K in 30L ⇒ 1.91 atm
FAQ
What constant is used?
R = 0.082057 L·atm/(mol·K).
Does it work for real gases?
It is an approximation for ideal behavior.
Additional Information
- See how pascals, kilopascals, and megapascals fit into ISO guidance in our [The Pascal (Pa): SI Unit of Pressure explainer](/units-and-measures/the-pascal-si-unit-of-pressure/).
Link gas law work to the mole definition
Reference the mole base unit guide to document how each n value ties back to the Avogadro constant and ISO 80000-9 terminology before sharing simulations or lab notes.
Keep molar masses consistent by pairing pressure calculations with the dalton (Da) explainer so that Penning-trap data, mass spectrometry references, and bulk material specs share the same atomic mass scale.