Calculator for atmospheric moisture
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Climate basics: Formulae for moisture in air | Moisture calculator | Moist air calculations < vapour pressure diagram (pdf) < moist air calculations (pdf)

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   pdf version

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