Millimeter Of Mercury

A millimeter of mercury (mm Hg) is a pressure unit that represents the height of a mercury column one millimeter tall, symbolized as mmHg, and is commonly used to express blood pressure, atmospheric pressure, and vacuum levels in medical, meteorological, and engineering applications; its precise, easily visualized measurement makes it essential for clinicians monitoring cardiovascular health, scientists calibrating barometric instruments, and technicians ensuring safe operation of vacuum systems, underscoring its lasting relevance in both practical everyday use and rigorous scientific research.