Use your browser's ''Back button'' to return to this page. The formula for density altitude Tim Brice of the El Paso NWS office supplied us with the formula. He also has the raw perl script files for the various programs on the El Paso Weather Calculator, including the formula for density altitude, if you want to program a computer to do the calculations. Click here to go to his index to files with the scrips. The standard rules of algebra apply.
Virtual temperature takes humidity into account.