The tool converts pressure measurements from pounds per square inch gauge (psig) to pounds per square inch absolute (psia). It adds atmospheric pressure to the gauge pressure reading to obtain the absolute pressure. As an illustration, if a pressure gauge reads 10 psig and the atmospheric pressure is 14.7 psia, the absolute pressure is 24.7 psia.
This conversion is essential in various engineering and scientific applications where absolute pressure is a critical parameter. Using absolute pressure ensures consistent and accurate calculations, particularly when dealing with gases and thermodynamic processes. Historically, the distinction between gauge and absolute pressure became increasingly important with the advancement of precision measurement instruments and the need for standardized pressure references.
