what does hg stand for in metric system
Inch of mercury Inch of mercury (inHg and "Hg) is a unit of measurement for pressure. It is still used for barometric pressure in weather reports, refrigeration and aviation in the United States.
Metrication in the United States Although customary units are used more often than metric units in the U.S., the SI system is used extensively in some fields such as science, medicine, the military, automobile production and repair, and international affairs. Post 1994 federal law also mandates most packaged consumer goods be labeled in both customary and metric units.[2] Yet, most Americans are not able to make metric conversions.[3] There exist, however, conversion apps on major smartphone platforms like iOS[4] and Android[5] that can help a person make the necessary conversions.