Square inch

The square inch is an Imperial unit/U.S. customary unit (non-SI non-metric) of area, used in the United States. It is defined as the area of a square with sides of 1 inch (0.2777 yards, 0.8333 feet, or 0.0254 metres) in length.

Symbols

There is no universally agreed symbol but the following are used:

• square inches, square inch, square in
• sq inches, sq inch, sq in
• inches/-2, inch/-2, in/-2
• inches^2, inch^2, in^2
• inches², inch², in²

Conversions

1 square inch is equivalent to:

• 0.0069444 square feet (exactly: 1/144)
• ≈0.000771604938 square yards
• ≈0.000000000249097669 square miles
• 0.000000064516 hectares
• ≈0.000000159422508 acres
• 6.4516 square centimetres
• 0.00064516 square metres

See also

• 1 E-1 m² for a comparison with other areas
• Cubic inch
• Orders of magnitude (area)
• Conversion of units
• Area (geometry)
• Square (algebra), square rootde:Quadratzoll

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