Anybody interested in a density altitude calculator?

Awesome, I'll check it out. I don't know how the horsepower function would be accurate, but I'd want it just for the DA part. I like to write it on my drag racing slips so I know all the data of a given day.
 
Cool thanks!

HP calculation is actually easy, it's just taking your SAE measured horsepower and removing the SAE correction factors for standard temperature, humidity, etc.. and replacing with actual current weather conditions. It's basically as if you got an uncorrected horsepower reading at the dyno.

If you don't have your SAE corrected number from a dyno, you can put in whatever horsepower you think you have. The relationship between base horsepower and current relative horsepower due to weather will basically remain the same.

You can verify all my calculations (if you have any doubts about them) here:

https://www.weather.gov/epz/wxcalc_densityaltitude

https://wahiduddin.net/calc/calc_hp_dp.htm

The density altitude formula was far more complex than I thought it would be, but I got it down in code within a few days. You can plug in your numbers into those sites and the figures should come out 100% exact as shown in the app
 
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