Psychrometric Calculations
Inputs
Unit Chosen: SI IP
Parameter Name Value Unit
Dry Bulb Temp.:
Wet Bulb Temp.:
Relat. Humidity:
Dew Point Temp
Altitude
Outputs
Atmospheric Press
Sat. Vapor Press.
Partial Vapor Press.
Humidity Ratio
Enthalpy
Specific Volume


The formulations used here to calculate moist air properties are based on perfect gas relations published in 1989 ASHRAE Fundamentals Handbook, which should be accurate enough in majority of air-conditioning problem. Nevertheless, I strongly recommend you to compare the results calculated by this worksheet with a psychrometric chart. There is no error checking so you should use reasonable input values. Don't hesitate to let me know if you find any bugs.

This psychrometric worksheet is copyrighted and brought to you by: G. Reza Zakeri.
For further information read the "Copyright Notice".