Weird Question? How to Calculate RH from Temp and Dewpoint

[Valid8r]

I am trying to calculate Relative Humidity (RH) from a Temperature Value and a Dewpoint Value.

Does anyone have a source for this calculation?


Thanks,
Jon

[Sparky Paul]

"enter search terms"...."relative humidity"
first hit..
http://www.uswcl.ars.ag.gov/exper/relhumeq.htm