Emergency Descent Calculator

Emergency descent time, distance, and time of useful consciousness for rapid decompression scenarios.

Current altitude (ft)

Target altitude (ft)

Descent rate (fpm)

Indicated airspeed (kts)

Headwind (kts, neg=tail)

Bank angle (degrees)

O2 pressure (PSI)

O2 flow rate (L/min)

Tab to move between fields

Descent time (min)

3.8

Time of useful consciousness (sec)

210

Descent time (sec)225

Horizontal distance (NM)15.2

Groundspeed (kts)243

True airspeed (kts)243

Turn radius (NM)0

O2 remaining (min)63

Completes before TUC (1=Yes)0

How to Use This Calculator

Enter your current altitude (ft) and target altitude (ft) for the emergency descent.
Set the planned descent rate (fpm) and indicated airspeed (kts) during the descent.
Enter headwind component (kts) and bank angle if turning during descent.
Review time to descend (minutes and seconds), horizontal distance covered (NM), and groundspeed.
Compare time of useful consciousness (TUC) to descent time for rapid decompression emergencies.

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