Talk:Density altitude

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What are the units of the density altitude given by the equation in this page?

The units are: hPa for P₀; K for T; The answer is given in ft; To transform to meters multiply the answer by 0.3048.

[edit] Units, accuracy etc

I am new to this, so excuse me if I am misunderstanding anything, but I don't understand how this formula can give the density altitude if it does not refer to the actual altitude. Testing it, it only seems to give the correct answer at sea level. For example:

Altitude = 6000 feet Temperature = 25 Deg C (298.15 K) Pressure = 1003.25 mb

Using a "rule of thumb" calculation one gets a density altitude of 8940 Feet, but the formula gives 1497 feet.

Am I doing something wrong?

[edit] An easier formula reqd

There exist easier rules of thumb formulae for converting from pressure altitude to density altitude which will be nearly as (in)accurate and of more pratcical use. Looking... Paul Beardsell 03:14, 6 January 2007 (UTC)

I've added an easier formula to calculate Density Altitude, hope this is the one you were looking for. We use this for Aviation Meteorology Calculation. Alex Fossaghi 16:21, 19 April 2007 (UTC)