I'm doing a flight planning speadsheet, more of an exercise in learning about flight planning and spreadsheets than anything else. Anyway, can anyone tell me if either or both of the following equations are valid for calculating pressure altitude?
1) Pressure altitude = ((1-(aerodrome QNH/1013.25)^0.190284) x 145366.45) + aerodrome elevation
2) Pressure altitude =(1-(aerodrome QFE/1013.25)^0.190284) x 145366.45
Cheers
