What is the normal pressure of air at sea level?

The normal pressure of air at sea level is approximately 14.7 pounds per square inch (psi). This value, known as atmospheric pressure, represents the weight of the air above a given area at sea level. Atmospheric pressure can vary with weather conditions, but standard practice considers 14.7 psi to be the average under typical conditions.

This value is important in various applications, including mining, as it affects how equipment functions, the behavior of gases, and the safety measures that must be adopted in underground environments. Understanding the standard atmospheric pressure can aid in tasks such as calibrating instruments, ensuring ventilation systems are operating effectively, and ensuring compliance with safety regulations.