What is inchhg?

Inchhg stands for inches of mercury and is a unit of measurement used to express atmospheric pressure. This unit of pressure is often used in areas where weather variations are significant, such as aviation, meteorology, and scuba diving. One inch of mercury is equivalent to approximately 33.86 millibars or hectopascals. This unit is named after the mercury barometer, an instrument used to measure atmospheric pressure by determining the height of a column of mercury. In everyday life, this unit may not be as commonly used as other pressure units such as pounds per square inch (psi) or kilopascals (kPa).