Absolute Altitude AGL Density Altitude 
Pilot Institute
APRIL 30, 2025
Calculating density altitude is like filing your taxes; annoying and often neglected until the last minute, but crucially important. Why is density altitude critical to ensuring safety, what factors affect it, and how is it calculated? Today is the day that the mystery of density altitude is solved.
Pilot Institute
FEBRUARY 1, 2025
Key Takeaways Pilots use six altitude types: Indicated, True, Absolute, Pressure, Density, and Flight Levels. Indicated altitude shows the altimeter reading, while true altitude refers to height above MSL. Absolute altitude measures height above ground, which is critical during approaches and landings.
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