What is the standard atmospheric pressure at sea level in inches of Hg?

The standard atmospheric pressure at sea level is defined as 29.92 inches of mercury (inHg). This standard value is established based on average conditions and is widely used in meteorological contexts. Atmospheric pressure can fluctuate due to changes in weather systems, but 29.92 inHg serves as the baseline, facilitating consistent measurement and comparison in aviation, meteorology, and various scientific applications. Understanding this standard is crucial for pilots and meteorologists as it aids in interpreting weather reports, flight levels, and altimeter settings effectively.