What is the Standard Atmospheric Pressure at sea level?

The Standard Atmospheric Pressure at sea level is defined as 29.92 inches of mercury (inHg). This value is recognized internationally for meteorological purposes and serves as a benchmark for measuring atmospheric pressure. Understanding this standard is crucial for various applications, including aviation, where pressure deviations from this standard can affect altimeter readings and, consequently, flight safety. The figure of 29.92 inHg not only represents the average atmospheric pressure but also plays a key role in calibrating instruments used in weather forecasting, navigation, and other scientific measurements.