How this calculator works
Enter amount of gas (mol), temperature (k), volume (l). Select Calculate to apply the displayed formula and review the labeled results.
Formula / method
P = nRT ÷ V, using R = 8.314462618 kPa·L·mol⁻¹·K⁻¹
Worked example
One mole at 298.15 K in 24.465 L has a pressure of about 101.33 kPa.
Assumptions and limitations
The gas behaves ideally and temperature is entered in kelvin.
Real gases deviate at high pressure, low temperature and near phase changes; use an equation of state when needed.