Calculator for atmospheric moisture


Air temperature     Wet temperature     Dewpoint     RH

Lock DP   


Kg/m3    Kg/Kg    Vapour pressure (Pa)    svp

Note that the kg/m3 is kg water per m3 of wet air.  The kg/kg is kg water per kg of bone dry air.

Enter air temperature (C) and wet bulb or dew point temperature or RH
All other values, except wet bulb, will be recalculated when you click or tab away from the entry

Click on the "Lock DP" box to enter a new temperature at the same dewpoint. This allows calculation of the RH that the air will acquire at a different temperature.

Note: This calculator makes approximations that limit its use to the natural climate near sea level.
Description of the calculations


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Copyright Tim Padfield