Full name: pound/square inch
Plural form: pounds/square inch
Alternate spelling: psi
Category type: pressure
Scale factor: 6894.75728
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.000145037738007 PSI.
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The pound per square inch or, more accurately, pound-force per square inch (symbol: psi or lbf/in² or lbf/in²) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch.