# ››Measurement unit: PSI

Full name: pound/square inch

Plural form: pounds/square inch

Symbol: lb/in2

Alternate spelling: psi

Category type: pressure

Scale factor: 6894.75728

# ››SI unit: pascal

The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.000145037738007 PSI.

# ››Convert PSI to another unit

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# ››Definition: Pound/square inch

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.

# ››Sample conversions: PSI

PSI to kilogram-force/square millimetre
PSI to pound/square inch [gauge]
PSI to poundal/square foot
PSI to hectobar
PSI to femtobar
PSI to kilonewton/square metre
PSI to centipascal
PSI to ton/square foot [long]
PSI to pound/square inch [absolute]
PSI to inch water [4 °C]