Ideal Gas Law Calculator
Applies PV=nRT relationships for gas volume, pressure, and temperature calculations. Includes real gas corrections using Z-factor for accurate high-pressure and low-temperature applications.
Calculation Type
Known Values
psia
ft³
Additional Parameters
mol
°F
Results
Result
-
-
Pressure-
Volume-
Moles-
Temperature-
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Formula
PV = nRT
P = Absolute pressure (psia)
V = Volume (ft³)
n = Number of moles (mol)
R = 10.7316 psi·ft³/(mol·°R)
T = Absolute temperature (°R)
Standards & References
GPSA Engineering Data Book
Gas Processors Suppliers Association
ASME B31.8
Gas Transmission and Distribution Piping
API MPMS Chapter 14.3
Orifice Metering of Natural Gas
Important Notes
Ideal Gas Law assumes no intermolecular forces and negligible molecular volume
Best accuracy at low pressures (< 100 psia) and high temperatures
For real gases, use compressibility factor (Z) correction: PV = ZnRT
Temperature must be in absolute units (°R = °F + 459.67)