How to Find Relative Barometric Pressure

Absolute barometric pressure is the actual atmospheric air pressure at a particular location that profoundly depends upon the location altitude. Relative or sea level pressure is the corrected barometric pressure calculated for the sea or zero level, and usually used to refer atmospheric conditions. The importance of the relative pressure (P0) is that it allows calculating the absolute pressure (P) at any elevation (h) using the barometric formula: P=P0*exp(-Mgh/RT), where M molar mass of air, g standard gravity, T temperature and R universal gas constant. The relative barometric pressure is the pressure reported by weather stations.

    Navigate to the Weather Channel website (see Resources), and enter the location ZIP code in the field; click "Search."

    Read the relative barometric pressure (labeled "Pressure") in inches of mercury.

    Navigate to the National Weather Service pressure unit converter (see Resources) to translate the pressure in inches of mercury to a different unit.

    Enter the pressure from Step 3 in the box, and select the "inches of mercury" radio button; click "Convert."

    Step 5

    Pressure values will be expressed in six different units.

Related Articles

Absolute Vs. Relative Barometric Pressure
How to Convert mm Hg to in Hg
How to Go From CM to MMHG
Five Different Types of Weather Maps
How to Convert Kilopascals to Joules
How to Convert mmHg to a kPa
Absolute Vs. Relative Barometric Pressure
How to Make a Weather Station Model
How to Understand Barometric Pressure Readings
How Does Temperature Affect Barometric Pressure?
How to Convert a Water Column to Pounds of Pressure
How to Calculate Fan Output
How to Calculate Vacuum Tank Stress
How to Calculate CV Values
How to Fill a Tractor Tire
The Definitions of Temperature, Dew Point and Barometric...
How to Find Partial Pressures
How to Find Relative Humidity
How Do I Check Millivolts on a Thermocouple?
How to Calculate Atmospheric Pressure
How to Set and Read a Barometer