Calibrated Airspeed Density Altitude Flight Plan 
Pilot Institute
FEBRUARY 1, 2025
Key Takeaways The E6B is a mechanical slide rule that helps pilots make calculations useful for flight planning Use the slide rule side to calculate time, speed, fuel, and air density calculations. You can also use it for unit conversions, estimating wind correction angles, and figuring out density altitude.
Air Facts
MARCH 10, 2025
To properly use your performance charts, you need to be able to figure out the pressure altitude, and understand what that meansagain, the one and only time during your training that this is strictly required. From pressure altitude, you can move to density altitude by correcting for non-standard temperature.
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