What is the atmospheric pressure at sea level?

The atmospheric pressure at sea level is typically standardized to a value of 14.7 psi absolute. This measurement refers to the pressure exerted by the atmosphere at sea level, which is a crucial reference point in various scientific and engineering applications. Atmospheric pressure can change with weather conditions and altitude; however, 14.7 psia is the accepted value under standard atmospheric conditions at sea level.

Understanding atmospheric pressure is vital in fields such as meteorology, aviation, and oceanography, where it affects weather patterns, aircraft performance, and ocean surface behavior, respectively.