**EDIT**: Forget about this… i found the solution here:

(This post can be deleted)

*I am trying to convert absolute pressure values to atmospheric pressure.*

*I found this on the net, but can’t get it to accurately compute… I might not be understanding how to implement the equation in the program…*

*here’s the equation:*

*My question is : What to do with the 5.25?? Should it be multiplied?*

*this is how I am computing it:*

*P = (P0× (1−(h / 44330.77)))*

*Then convert from Pascals to inH:*

*AP = (P÷100)×0.02953*

*With inputs of:*

*h = 448*

*p0 = 100900*

*I should get: 29.78 Atmospheric Pressure*

*I am getting: 29.47 Which is close. But not close enough.*

*I am inputing values from my local airport reports… So I know the WUnderground conversions are correct… So it’s an issue on my part. If I multiple the (5.25) outside the brackets I get values WAY off… So… Any help would be welcomed!*