#### skateosiris

##### Well-Known Member

So you first calculate the pressure altitude for your cruise altitude and the field elevation. Then say if you get a pressure altitude of 2300 for airport elevation and 4200 for cruise elevation, do you just use the 2000 and 4000 on the chart because thats what its closest to? Then subtract the difference in Gallons used for both, to get the fuel used for climb?

Any help would be greatly appreciated