Symbol
inHg
Abbreviation of inch of mercury, a unit of pressure equal to the amount of fluid pressure one inch deep in mercury at the standard acceleration due to gravity.
Average sea-level pressure is 101.325 kPa (1013.25 hPa or mbar) or 29.92 inches (inHg) or 760 millimetres of mercury ( mmHg ). Source: Internet
The pressure dropped gradually as the vortex approached then dropped extremely rapidly to 850 mbar ( hPa ) (25.10 inHg ) in the core of the violent tornado before rising rapidly as the vortex moved away, resulting in a V-shape pressure trace. Source: Internet
When flying at a flight level, the altimeter is always set to standard pressure (29.92 inHg or 1013.25 hPa ). Source: Internet