Density altitude
Pressure altitude corrected for nonstandard temperature (FAA-H-8083-25C ch 11), computed with the same standard-atmosphere inversion that drives the density-altitude sim — not the 120 ft/°C rule of thumb.
ALT & SPD
DENSITY ALTITUDE2/32SOLVED
ft
inHg
°C
kt
How this is computed
Pressure altitude corrected for nonstandard temperature (FAA-H-8083-25C ch 11), computed with the same standard-atmosphere inversion that drives the density-altitude sim — not the 120 ft/°C rule of thumb. TAS scales CAS by 1/√σ at the density altitude. Worked example: a PA-28 at a 5,000 ft field, 30.10 inHg and a 30 °C afternoon is already at 7,583 ft density altitude.
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