square inch | |
Standard: | Imperial, United States customary units |
Quantity: | area |
Symbol: | in2 |
Symbol2: | sq in |
Units1: | Imperial/US |
Units2: | SI units |
A square inch (plural: square inches) is a unit of area, equal to the area of a square with sides of one inch. The following symbols are used to denote square inches:
The square inch is a common unit of measurement in the United States and the United Kingdom. A common unit of pressure, pound per square inch (psi) is derived from this unit of area.
1 square inch (assuming an international inch) is equal to: (the overbars indicate repeating decimals)