Copyright: Tim Padfield 2008. Licence for use: creative commons - free to use and to copy and distribute - author must be acknowledged - no derivative works - no commercial use.
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
This html page with java script is self sufficient: you can download it to your own computer and it will still work.
Copyright: Tim Padfield 2008. Licence for use: creative commons - free to use and to copy and distribute - author must be acknowledged - no derivative works - no commercial use.