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The following psychrometric calculator can be used to determine the properties of moist air. Three parameters must be specified: (total) pressure, (dry-bulb) temperature, and either the wet-bulb temperature, dew point temperature, relative humidity or absolute humidity. For definitions and underlying equations see the article about Moist Air. Note that the specific thermodynamic properties (volume, enthalpy, heat capacity) are calculated on the basis of mass of dry air instead of mass of moist air (mixture) and that the zero point for the enthalpy is arbitrarily fixed at 0 °C.

If no calculator applet appears below either your browser doesn't support Java (but most newer browsers do) or you must enable Java. I can not and do not guarantee the accuracy of the results or their applicability to your circumstances.

Other psychrometric calculators have been made available by Michael J. Rocchetti and Rich Gates.

If you have any questions or comments please feel free to post on the bulletin board.

Java applet by Bernhard Spang