A pressure reading of 14.7 psia is equivalent to?

A pressure reading of 14.7 psia, which stands for pounds per square inch absolute, represents the absolute pressure at sea level. This value indicates the total pressure exerted on a surface and includes atmospheric pressure. Since gauge pressure (psig) measures pressure relative to atmospheric pressure, if you have a reading of 14.7 psia, it means that the gauge pressure is 0 psig. This is because 14.7 psia minus atmospheric pressure (also approximately 14.7 psia under standard conditions) results in zero.

In practical terms, when a pressure gauge reads 0 psig, it signifies that it is at atmospheric pressure, which is the condition where there is no additional pressure applied above the atmospheric baseline. Therefore, a pressure reading of 14.7 psia directly correlates to a gauge reading of 0 psig. Understanding these concepts is crucial for accurate pressure measurements and ensuring safety and reliability in various applications.