Professional Quality Psychrometric Calculator

Calculate Thermodynamic Properties of Moist (Humid) Air

Features:

Psychrometric Calculator

Based on a real gas formulation, there are no simplifications;
No installation required;
Always work with the latest version;
Access it from any computer in the world;
Accurate and easy to use;
Save data to Excel.

Psychrometric Calculator v4.0 released <- NEW

Improved user experience (see right column below).

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	Description The site provides a fully functional, professional quality web application for calculation of thermodynamic properties of moist air. The "Psychrometric Calculator" is based on the most accurate formulations for thermodynamic properties of moist air currently available. These formulations are approved by ASHRAE (American Society of Heating, Refrigeration and Air-conditioning Engineers) as documented in the 1997 ASHRAE Handbook "Fundamentals". Hyland and Wexler presented the equation of state in: Formulations for the thermodynamic properties of the saturated phases of H2O from 173.15 K to 473.15 K, W. Hyland and A.Wexler, ASHRAE Transactions, 89(2A) 500-519, 1983. Formulations for the thermodynamic properties of dry air from 173.15 K to 473.15 K, and of saturated moist air from 173.15 K to 372.15 K, at pressures to 5 MPa, R. W. Hyland and A. Wexler, ASHRAE Transactions, 89(2A) 520-535, 1983.


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	NEW Psychrometric Calculator Improved user experience The following user settings, from the last session, are now automaticaly restored: Units Theme Setup Panel visibility Output Panel visibility Registered users can select a new option during Login process, to be automaticaly logged-in in the future The new features are available only for modern browsers: IE 8+, FF 3.5+, Safari 4.0+, Chrome 4.0+, Opera 10.5+.