Specific Volume of Air Calculator

Calculate the volume occupied by one pound of moist air. Essential for converting between mass and volume flow rates.

Measured air temperature.
°F
Relative humidity percentage.
%
Atmospheric pressure (standard = 14.696).
psia

Results

Specific Volume-ft³/lb
Air Density-lb/ft³
Humidity Ratio-lb/lb
CFM per lb/hr-CFM/(lb/hr)
References: ASHRAE Fundamentals Chapter 1: Psychrometrics; Ideal Gas Law for Moist Air