INCHES OF MERCURY (Hg) The name comes from the use of mercurial barometers which equate the height of a column of mercury with air pressure. One inch of mercury is equivalent to 33.86 millibars or 25.40 millimeters.
Inches of Mercury
(or in Hg) Unit of atmospheric pressure used in the United States. The name comes from the use of mercurial barometers which equate the height of a column of mercury with air pressure. One inch of mercury is equivalent to 33.
29 117/127 inches of mercury ≈ 29.92 inHg
760 millimetres of mercury (mmHg) or torrs (Torr)
1013.25 millibars (mbar, also mb) or hectopascals (hPa)
14.6959 psia or 0 psig (pounds-force per square inch, absolute or gauge) (lbf/in²)
2116.
To convert millibars (mb) to inches of mercury (in Hg), divide the millibar reading by 33.86:
in Hg = mb / 33.
92 inches of mercury, and a temperature lapse rate of 0.65 degrees Celsius per 100 meters up to 11 kilometers in the atmosphere. STANDARD SURFACE PRESSURE The measurement of one atmosphere of pressure under standard conditions.
53 inches of mercury. Barogram The record of a barograph. Barograph A continuous-recording barometer. Barometer An instrument for measuring the pressure of the atmosphere. The two principal types are aneroid and mercurial.
92 inches of mercury, and is therefore the indicated altitude above the 29.92 constant pressure surface.
92 inches of Mercury....1013.20 Millibars.
Westerlies: Winds which blow from the west.
Wet Bulb Depression: The difference between the dry bulb and wet bulb temperature. Example: Dry Bulb = 70 Degs. F. Wet Bulb = 60 degs. F.
02953 inches of mercury (Hg). It is therefore only necessary to multiply a reading in millibars by the latter figure, to achieve the required conversion. E.g. for 1023 mbar, multiply by 0.02953=30.21 inches.
Air pressure is usually measured in millibars or in inches of mercury. Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir.
Millibar (mb): Unit of atmospheric pressure. It is equal to 0.03 inches of mercury. One thousand millibars equals 29.55 inches of mercury on a barometer.
In aviation and television weather reports, pressure is given in inches of mercury ("Hg), while meteorologists use millibars (mb), the unit of pressure found on weather maps.
Standard atmospheric pressure A pressure of 1013.26 millibars (mb), 29.92 inches of mercury (Hg), 760 millimeters (mm) of mercury, 14.7 pounds per square inch (lb/in.2), 101,326 pascals (Pa).
A surface temperature of 59° F (15° C) and a surface pressure of 29.92 inches of mercury (1013.2 millibars) at sea level;
A lapse rate in the troposphere of 6.5° C per kilometer (approximately 2° C per 1,000 feet); ...
bar - A unit of pressure equal to 106 dyne cm-2 (106 barye), 1000 millibars, 29.53 inches of mercury.
Millibars-Unit of atmospheric pressure. Other possible units of pressure used by scientists are inches of Mercury, and torr.
The measurement of one atmosphere of pressure under standard conditions. It is equivalent to 1,013.25 millibars, 29.92 inches of mercury, 760 millimeters of mercury, 14.7 pounds per square inch, or 1.033 grams per square centimeter.
PRESSURE: The force exerted by the weight of air above a given point, usually expressed in millibars (mb) or inches of mercury (in. Hg).
BAROMETER - Instrument used to measure the pressure of the air. Common units are MILLIBARS (MB) and INCHES of mercury (IN/Hg).
Barometer - An instrument used to measure air pressure. The international standard of measurement is the kilopascal although millibars and inches of mercury are also commonly used.
Standard Atmospheric Pressure - the pressure exerted by a 760 millimeter column of mercury at sea level at a temperature of 0 degrees Celsius; equal to 1013.25 millibars (mb), 29.92 inches of mercury (in of Hg), or 14.7 pounds per square inch ...
Pressure The force exerted by the weight of the atmosphere, also known as atmospheric pressure. When measured on a barometer, it is referred to as barometric pressure and it is expressed in inches of mercury, millibars, or kiloPascals.
The height of the column is the measure of atmospheric pressure and was originally reported as millimetres or inches of mercury (Hg). Today, the preferred unit is the Pascal, usually expressed as the kilopascal (kPa).
 See also: Weather, Pressure, Air, Temperature, Water
  
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