Instructions
PsyCalc^® is used to find psychrometric properties of an air sample when two properties are known.

Use the button at the top to toggle between IP (inch-pound commonly called English) or SI (System International commonly called metric) units.

Configure each input's property using its dropdown then enter it's value. PsyCalc^® returns a set of psychrometric properties for the point.

The third input set is for elevation above sea level or an absolute pressure.

Use Save as Defaults to save the current property values as your start up values. These will be saved in a cookie for 1 year.

Properties
Psychrometric -
   °Fdb / °Cdb - Dry Bulb Temperature.
   °Fwb / °Cwb - Wet Bulb Temperature.
   %RH - Relative Humidity.
   Btu/lb / kJ/kg - Enthalpy.
   °Fdp / °Cdp - Dew Point Temperature.
   gr/lb / g/kg - Humidity Ratio.
   ft³/lb - m³/kg - Specific Volume.
   in Hg VP / mm Hg VP - Vapor Pressure.
   lb/ft³ / kg/m³ - Density.
   gr/ft³ / g/m³ - Absolute Humidity.

Pressure -
   Alt in Ft / m - Altitude (elevation).
   psia / kPa - Absolute Pressure.

License
Linric Company grants you a non-exclusive license operate this online tool.

This license is not a sale of this tool or any copies thereof. Linric Company retains the rights to this software and any and all subsequent copies regardless of their form. Reverse engineering of this software is prohibited by this license agreement.

Disclaimer
PsyCalc uses algorithms that are generally accepted by the Heating Ventilation and Air Conditioning (HVAC) industry. As such the results of these calculations should yield acceptable results for use in general HVAC work. The exactness of the calculation methods employed are not 100% over the entire range of their application and as such they can only be termed "Approximations".