What is a PSI (psi)?

PSI (pounds per square inch) is a unit of pressure commonly used in the US, equal to approximately 6,894.76 pascals.

Definition

Symbol

psi

Category

Pressure

System

Imperial

1 {unit} = {value} {otherUnit}

1 PSI = 6894.76 Pascal (Pa)

1 PSI = 6.89476 Kilopascal (kPa)

1 PSI = 0.00689476 Megapascal (MPa)

1 PSI = 0.0689476 Bar (bar)

1 PSI = 0.068046 Atmosphere (atm)

Common Uses

  • Tire pressure in US
  • Air compressors
  • Water pressure

PSI Conversions

Related Units