Psychrometric Properties
English Units

Barometric pressure based on:

Elevation (feet)
Actual Pressure (psia)
Actual Pressure (In. Hg.)

Enter Value:

 Humidity measured as:

RH (%)
Wet Bulb (oF)
Dew Point (oF)

Value:

Enter Dry Bulb Temperature:

(oF)

 Calculate wind chill based on a
Wind Speed of Mph


Psychrometric Chart Properties

Barometric
Pressure
(psia)
Dry
Bulb
(oF)
Wet
Bulb
(oF)
Dew
Point
(oF)
Enthalpy
(Btu / lb da)
Relative
Humidity
(%)
Humidity Ratio Moist Air
Specific Volume
(ft3 / lb da)
(lb h2o / lb da) (gr h2o / lb da)

Other Thermodynamic Properties

Specific
Humidity
(lb h2o / lb)
Absolute Humidity
(lb h2o / ft3)
Degree of
Saturation
(%)
Specific Volume
(ft3 / lb)
Density
(lb / ft3)
Specific Heat (Btu / lb-oR) Entropy
(Btu / lb-oR)
Isobaric Isometric k
Gas Constant
(ft-lbf / lb-oR)
Virtual
Temperature
(oF)
Sensible
Enthalpy
(Btu / lb)
Latent
Enthalpy
(Btu / lb)
Internal
Energy
(Btu / lb)
Mole Fraction
Dry Air
(%)
Molecular Weight Wind Chill
(oF)
Speed of Sound
(ft / sec)
lb = pound mass of moist air
lb da = pound mass of dry air
lbf = pound force
psia = pound force per square inch absolute
cf = cubic foot of moist air
gr = grain (7000 grains = 1 pound mass)
oR = absolute temperature (degrees Rankine)