Full name: pound/square inch [absolute]
Plural form: pounds/square inch
Symbol: lb/in2
Alternate spelling: psia
Category type: pressure
Scale factor: 6894.75728
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00014503773800722 pound per square inch.
Valid units must be of the pressure type.
You can use this form to select from known units:
Pounds per square inch absolute (psia) is used to make it clear that the pressure is relative to a vacuum rather than the ambient atmospheric pressure. Since atmospheric pressure at sea level is around 14.7 psi, this will be added to any pressure reading made in air at sea level.