Pressure, Atmospheric

 
Atmospheric pressure exerted by the earth's atmosphere. The normal pressure measured by a barometer at sea level is equivalent to a column of mercury 29.92 inches high or 14.696 psia.
The following formula can be used to calculate the atmospheric pressure for a given elevation:
For elevation greater than 50 feet:
 

For elevation < 50 ft, use
 
 

Ariel Corporation Application Manual
18-Sep-96