The full name of PSI in English is Pounds per square inch. P refers to pound, S refers to square, and I refers to inch. The United States is customary to use psi as the unit, the specific unit is "lb/in2" , which means "pounds/square inch". In China, we generally describe the pressure of gas as "kg"), and its unit is "kg/cm2". One kilogram of pressure means that one kilogram of force acts on one square centimeter. The conversion relationship is as follows: 1psi=6.895KPa=0.0689476bar=0.006895MPa1 standard atmospheric pressure (atm)=14.696 pounds/inch 2 (psi) so 60 psi pressure gauge: 60psi=4.08274 standard atmospheric pressure (atm)= 413.7kPa=4.1369bar=0.4137 Mpa.