For his entry to The Hackaday Prize, [Neil McNeight] is building an automated density altitude calculator to automate the process entirely.

Normally density altitude is computed through a slide rule or a flight computer, with the pilot entering in altitude and temperature, but somehow accidents still happen.

Pressure altitude is altitude with altimeter set to 29.92" Hg, used for aircraft performance charts above 18,000 ft in US/Canada. Density altitude corrects pressure altitude for temperature ...

Is there a plug and chug way to do it if I know my barometric pressure, temp, and altitude? I need to get it everyday before I have a flying lesson. I hate using that round slide-rule flight ...