# Difference between revisions of "Pounds-force-per-square-inch"

Pounds-force-per-square-inch is an engineering unit that falls under the pressure group, and is commonly used by automation professionals.

## Definitions

• 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.
• Pound-force per square inch is a non-SI unit of pressure based on avoirdupois units. In casual English language use it is rendered as "pounds per square inch", abbreviated to psi with little distinction between "mass" and "force".

## Conversion to SI and other common units

1 Pound force per square inch (psi) equals to:

 0.0703071 Atmosphere (metric) 0.0680458 Atmosphere (standard) 0.0689474 Bar 68947.4 Barad 68947.4 Barye 5.17149 Centimeter of mercury (0 °C) 70.3085 Centimeter of water (4 °C) 68947.4 Dyne/square centimeter 2.30672 Foot of water (4 °C) 6.9e-06 Gigapascal 68.9474 Hectopascal 2.03602 Inch of mercury (0 °C) 2.04157 Inch of mercury (15.56 °C) 27.7069 Inch of water (15.56 °C) 27.6806 Inch of water (4 °C) 0.0703071 Kilogram force/centimeter2 7.03071 Kilogram force/decimeter2 703.071 Kilogram force/meter2 0.0007031 Kilogram force/millimeter2 6.89474 Kilopascal 0.001 Kilopound force/square inch 0.0068947 Megapascal 0.703754 Meter of water (15.56 °C) 0.703085 Meter of water (4 °C) 68947.4 Microbar (barye, barrie) 51714.9 Micron of mercury (millitorr) 68.9474 Millibar 51.7148 Millimeter of mercury (0 °C) 703.753 Millimeter of water (15.56 °C) 703.085 Millimeter of water (4 °C) 51714.9 Millitorr 6894.74 Newton/square meter 221671 Ounce force (avdp)/square inch 6894.74 Pascal 144 Pound force/foot2 1 Pound force/inch2 4633.05 Poundal/square foot 32.174 Poundal/square inch 0.0680458 Standard atmosphere 0.0642855 Ton (long)/foot2 0.0004464 Ton (long)/inch2 7.03e-05 Ton (metric)/centimeter2 0.0719998 Ton (short)/foot2 0.0005 Ton (short)/inch2 0.0004464 Ton/inch2 51.7149 Torr

## Communication Protocol Support

This engineering unit is supported by the following communication protocols:

1. BACnet

• 2008 specification.
• Enumeration=56

2. CIP (includes Ethernet/IP)

• Enumeration=0x1300
• Base Unit=6.894757 • 103 • Pa