psi [psi] Unit Converter

Definition of psi [psi] unit

Pounds per square inch (psi) is a pressure unit equal to one pound-force applied over one square inch of area. One psi equals approximately 6,894.76 pascals, or 0.0689476 bar, of pressure.

History of psi [psi] unit

The psi unit developed from British and American measurement practices, combining the avoirdupois pound, a unit of force in customary usage, with the square inch, an area measure. It became established during the Industrial Revolution as engineers and manufacturers needed ways to specify pressures in steam equipment, pumps, hydraulics, and tires. Although the pascal is the SI unit, psi remains deeply embedded in United States engineering and commerce. Its symbol reflects the phrase “pounds per square inch,” and documents often distinguish psi from psig and psia.

Applications of psi [psi] unit

Today, psi is commonly used to report tire pressure, bicycle and automotive inflation, compressed-gas storage, water systems, and hydraulic equipment. Mechanics and technicians specify operating limits for pumps, hoses, cylinders, and regulators in psi. Weather and scientific work generally prefer pascals, but psi remains standard in many consumer products, industrial specifications, and North American service environments.

Complete list of psi [psi] unit conversion

• pascal [Pa] = 0.00014503773773022 psi [psi]
• kilopascal [kPa] = 0.14503773773022 psi [psi]
• bar = 14.503773773022 psi [psi]
• ksi [ksi] = 1000 psi [psi]
• Standard atmosphere [atm] = 14.695948775514 psi [psi]
• exapascal [EPa] = 1.4503773773022E+14 psi [psi]
• petapascal [PPa] = 145037737730.22 psi [psi]
• terapascal [TPa] = 145037737.73022 psi [psi]
• gigapascal [GPa] = 145037.73773022 psi [psi]
• megapascal [MPa] = 145.03773773022 psi [psi]
• hectopascal [hPa] = 0.014503773773022 psi [psi]
• dekapascal [daPa] = 0.0014503773773022 psi [psi]
• decipascal [dPa] = 1.4503773773022E-5 psi [psi]
• centipascal [cPa] = 1.4503773773022E-6 psi [psi]
• millipascal [mPa] = 1.4503773773022E-7 psi [psi]
• micropascal [µPa] = 1.4503773773022E-10 psi [psi]
• nanopascal [nPa] = 1.4503773773022E-13 psi [psi]
• picopascal [pPa] = 1.4503773773022E-16 psi [psi]
• femtopascal [fPa] = 1.4503773773022E-19 psi [psi]
• attopascal [aPa] = 1.4503773773022E-22 psi [psi]
• newton/square meter = 0.00014503773773022 psi [psi]
• newton/square centimeter = 1.4503773773022 psi [psi]
• newton/square millimeter = 145.03773773022 psi [psi]
• kilonewton/square meter = 0.14503773773022 psi [psi]
• millibar [mbar] = 0.014503773773022 psi [psi]
• microbar [µbar] = 1.4503773773022E-5 psi [psi]
• dyne/square centimeter = 1.4503773773022E-5 psi [psi]
• kilogram-force/square meter = 0.001422334330712 psi [psi]
• kilogram-force/sq. cm = 14.22334330712 psi [psi]
• kilogram-force/sq. millimeter = 1422.334330712 psi [psi]
• gram-force/sq. centimeter = 0.01422334330712 psi [psi]
• ton-force (short)/sq. foot = 13.888888888891 psi [psi]
• ton-force (short)/sq. inch = 2000 psi [psi]
• ton-force (long)/square foot = 15.555555555556 psi [psi]
• ton-force (long)/square inch = 2240.0000000001 psi [psi]
• kip-force/square inch = 1000 psi [psi]
• pound-force/square foot = 0.0069444444444448 psi [psi]
• pound-force/square inch = 1 psi [psi]
• poundal/square foot = 0.00021583993174701 psi [psi]
• torr [Torr] = 0.019336774704624 psi [psi]
• centimeter mercury (0°C) = 0.19336721269668 psi [psi]
• millimeter mercury (0°C) = 0.019336721269668 psi [psi]
• inch mercury (32°F) [inHg] = 0.49115419963449 psi [psi]
• inch mercury (60°F) [inHg] = 0.48977068465428 psi [psi]
• centimeter water (4°C) = 0.01422334330712 psi [psi]
• millimeter water (4°C) = 0.001422334330712 psi [psi]
• inch water (4°C) [inAq] = 0.036127292000086 psi [psi]
• foot water (4°C) [ftAq] = 0.43352750400103 psi [psi]
• inch water (60°F) [inAq] = 0.036091190656787 psi [psi]
• foot water (60°F) [ftAq] = 0.43309428788145 psi [psi]
• atmosphere technical [at] = 14.22334330712 psi [psi]