WebStandard air pressure at standard elevation (sea level) at 15°C and 45° latitude is 1013 hPa or 29.92 inches of mercury. Most dial type barometers employ an air pressure sensor with a limited range of sensitivity. Generally the working altitude range covers only about 3000 to … WebJun 25, 2009 · One inch of mercury is equivalent to 33.86 millibars or 25.40 millimeters. See barometric pressure. First divised in 1644 by Evangelista Torricelli (1608-1647), an Italian physicist and mathematician, to explain the fundamental principles of hydromechanics. To convert millibars (mb) to inches of mercury (in Hg), divide the millibar reading by ...

What is an inch of mercury (unit) - Aqua-Calc

WebAt sea level, air pressure averages 29.92 inches of mercury. That means a glass tube with air completely pumped out and sealed at its upper end and placed in a dish of mercury at … WebInches of mercury or inHg is a non-SI unit for pressure. It is still widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere. It is defined as the pressure exerted by a column of mercury of 1 inch in height at 32 °F (0 °C) at the standard acceleration of gravity. ... josh christopher brother

Inch of mercury - Glossary of Meteorology - American …

WebAt stations near sea level, the column of mercury rises on the average to a height of 29.92 inches or 760 millimeters. In other words, a column of mercury of that height weighs the same as a column of air having the same cross section as the column of mercury and extending from sea level to the top of the atmosphere. WebThe inch of mercury (inHg) is defined as the pressure exerted at the base of a column of fluid exactly 1 inch (in) high, and the fluid density is exactly 13.5951 gram per cubic … josh christopher houston rockets