What is standard sea level pressure measured in inches of mercury?

Standard sea level pressure is defined as 29.92 inches of mercury (Hg). This value is derived from the standardized atmospheric pressure at sea level, which is essential for various calculations in aviation, meteorology, and engineering. The reference value of 29.92 inches of mercury is the norm used for calibrating altimeters and is crucial for ensuring accurate altitude readings during flight.

Understanding this reference pressure helps pilots and engineers maintain consistency in performance data, such as air density and lift calculations, which are affected by pressure changes. When pressure is measured against this standard, it enables a better understanding of weather conditions and is fundamental in flight operations and safety management.