Altitude & Atmospheric Pressure

Welcome to pressure folks, where atmospheric pressure is calculated based on height above or below sea level. I worked for awhile to get these calculators. I tried several times to make my own, but I live at a very odd altitude. I get very strange barometric pressure readings at times. Made it very difficult to produce accurate calculators so I gathered these from around the network, they are accurate as they can be. Some tell you what your pressure should be; some tell you the percents of pressure on you at a given altitude. Others tell you information about the city you live in, such as geographical information, height above sea level, and population, and geographic coordinates on a map. Enjoy the pressure.

Pressure Setting Adjustments

by Tim Brice of the National Weather Service and Todd Hall of the National Weather Service
brought to you by Tmax Weather Center

 

 
 
Enter the elevation of the station and choose your units: Altimeter Setting in in. of mercury:
feet meters in HG
Enter your station pressure (not the altimeter setting) and choose your units: Altimeter Setting in mm of mercury:
in of mercury mm of mercury millibars (hPA) mm HG
  Altimeter Setting in millibars (hPa):
  mb (hPA)

Your Atmospheric Pressure

Barometric Pressure

The amount of force exerted over a surface area caused by the weight of air molecules above it. As elevation increases, fewer air molecules are present. Therefore, atmospheric pressure always decreases with increasing height. A column of air in cross section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 (psi) pounds per square inch. The standard value for atmospheric pressure at sea level is equal to ...
1 atm = 760 mm Hg (millimeters of mercury) = 1013 millibars = 14.7 psi (pounds force per square inch) = 1013.25 hPa (hectopascals).

The following JavaScript form calculates the atmospheric pressure at any altitude. Not sure of measurements, see further below for a calculator. Not sure about your elevation above sea level enter it here

Surface pressure (atmospheres; earth = 1):
Surface gravity (Earth gravities; earth = 1):
Atmospheric mean molecular weight (atomic mass units; earth = 29):  
Altitude (meters above sea level):

The % of atmospheric pressure at this altitude is:  

Not Sure of Location Elevation Enter the name of the place you want to look up, make sure you press back once you find the location elevation.

For example, enter "cambridge, ma" to look up Cambridge, Massachusetts. If you enter just "cambridge", you will get information on all towns called Cambridge.

This server contains mostly information on locations within the US.

This data is considered current

Placename:

For Populations if the above doesn't give you that information, and thats what your seeking Input information below to get the most accurate information, Thanks.


Search for a Place in the US

Name: State (optional):
or a 5-digit zip code:


Length Equivalents
First, type the number you wish converted here:
Then, click radio buttons for desired conversion:
From: Centimeters
 Inches
 Feet
 Yards
 Meters
 Chains
 Kilometers
 Miles
To: Centimeters
 Inches
 Feet
 Yards
 Meters
 Chains
 Kilometers
 Miles

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