No ads. aRhoAIR is a state point psychrometric air properties calculator to find air density, specific heat, various vapour pressure, dew point temperature, moisture content, enthalpy, etc. It is specially developed by a professional engineer to replace the psychrometric chart. aRhoAIR will change the way you normally find air properties, air density and specific heat by using conventional psychrometric chart. - input options - RH or Twb. - input options - Z (altitude) or P (pressure) with units selection (Pa, hPa, kPa, mbar, bar, in.Hg, psi, atm) - calculation formulation based on ASHRAE guidelines. - in SI & IP units. for detail and worked example, see https://sites.google.com/view/pocketengineer/android-os/rhoair-free-and