Air temperature (°C)
Wet bulb (°C)
Dewpoint (°C)
RH (%)
Lock Dewpoint
Vapour pressure (Pa)
Saturation VP (Pa)

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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