Standard atmospheric pressure

Standard atmospheric pressure is the average pressure exerted by the Earth's atmosphere at sea level, roughly equivalent to the weight of a 1-kilogram object pressing down on a 1-square-centimeter area. It is approximately 101.3 kilopascals or 14.7 pounds per square inch. This measurement helps scientists and engineers compare atmospheric conditions across different locations and altitudes, serving as a reference point for weather forecasting, aviation, and various scientific calculations. Essentially, it reflects the force of air molecules collectively pushing down due to gravity at sea level under normal conditions.