Ideal Gas Pressure Calculator

An ideal gas is a theoretical gas comprised of point-like particles with no intermolecular forces. Any collisions between gas particles must be perfectly elastic. This consideration provides a significant mathematical advantage since the ideal gas law describes the relationship between the gas's pressure, temperature, and volume:

where:

• — Pressure of the ideal gas;
• — Volume of the ideal gas;
• — Number of moles of particles in the ideal gas;
• — Ideal gas constant, equal to ; and
• — Temperature of the ideal gas.

We can consider some real gases ideal around standard temperature and pressure (STP). Gases express ideal behavior at higher temperatures and lower pressures as the particles' kinetic energy will be high enough to make intermolecular forces negligible.

To calculate the gas pressure using the ideal gas law, follow these steps:

1. Multiply the gas temperature in Kelvin by the number of moles of particles in the gas.
2. Multiply this result by the ideal gas constant, equal to 8.314 J⋅K^-1⋅mol^-1.
3. Divide this result by the gas volume in cubic meters to obtain the gas pressure.

Our ideal gas pressure calculator is versatile and easy to use:

• You can enter the volume V, the number of moles n, and temperature T, and this tool will automatically calculate pressure using the ideal gas law.

• You can expand the Calculating number of moles section of our ideal gas pressure calculator if you need to determine the number of moles n from the mass and molar mass of the gas. Learn how to do this using our mole calculator.

We have more ideal gas law calculators for you to explore:

• Ideal gas law calculator;
• Ideal gas volume calculator; and
• Ideal gas temperature calculator.