Mountain Flying Calculator

Density altitude, climb performance, and ridge clearance analysis for mountain flying operations.

Field elevation (ft)

Temperature (°C)

Altimeter (inHg)

Ridge elevation (ft)

Distance to ridge (NM)

Sea-level climb rate (fpm)

Cruise TAS (kts)

Headwind (kts, neg=tail)

Ridge clearance (ft)

Aircraft weight (lb)

Max gross weight (lb)

Tab to move between fields

Density altitude (ft)

11,100

Available climb (fpm)

Required climb (fpm)496

Can clear ridge (1=Yes)0

Min crossing alt (ft)12,500

Time to climb (min)57.5

Distance during climb (NM)85.6

Climb gradient (ft/NM)58

Pressure altitude (ft)7,500

Ridge Density Alt14,100

How to Use This Calculator

Enter field elevation (ft), outside air temperature (°C), and altimeter setting (inHg).
Set the ridge elevation (ft) to clear and distance to that ridge (NM).
Enter your sea-level climb rate (fpm) from the POH at your gross weight.
Review density altitude, available climb rate at altitude, required climb rate, and minimum crossing altitude.
If your available climb does not exceed the required rate, depart earlier in the day or reduce weight.

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