This is a free service. Free Psychrometric Calculator online. Calculate thermodynamic properties based on dry bulb temperature, relative humidity and pressure at 1 bar or 14.5 psi. Save data …

Calculate online thermodynamic properties of moist (humid) air based on Hyland and Wexler formulation approved by American Society of Heating, Refrigeration and Air-conditioning …

Detailed help page describing for how to use the features of the Psychrometrics Calculator.

Changes in state, such as when two air streams mix, can be modeled easily and somewhat graphically using the correct psychrometric chart for the location's air pressure or elevation …

For immediate access to the premium features of the HumidAir Web - Psychrometric Calculator, you may purchase a 5 months subscription by using our automated and secure online ordering …