Free Ideal Gas Law Calculator
Calculate pressure, volume, or temperature of an ideal gas using PV = nRT.
mol
K
L
Pressure
1.0000 atm
Pressure (Pa)101,319 Pa
Pressure vs Amount of Gas (n)
Ideal Gas Law
The ideal gas law relates the pressure, volume, temperature, and amount of a gas.
Formula
PV = nRT
where R = 0.082057 L·atm/(mol·K) or 8.314 J/(mol·K). This law is accurate for gases at moderate pressures and temperatures.
Example Calculation
1 mole of gas at 273.15 K (0°C) in 22.414 L (STP conditions).
- 01P = nRT / V
- 02P = 1 * 0.082057 * 273.15 / 22.414
- 03P = 22.414 / 22.414
- 04P = 1.000 atm (as expected at STP)
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