Square inch
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A square inch (plural: square inches) is a unit of area, equal to the area of a square with sides of one inch. The square inch is a common unit of measurement in the United States and the United Kingdom.[1] Pounds per square inch (psi), a unit of pressure, are derived from this unit of area.[2]
Representations
The following symbols are used to denote square inches:[1][2][3]
- square in
- sq inches, sq inch, sq in
- inches/-2, inch/-2, in/-2
- inches^2, inch^2, in^2
- inches2, inch2, in2 (also denoted by "2)
- historic usage □″ (number with a square & a double apostrophe, both as an exponent)
Equivalence with other units of area
1 square international inch is equal to (the overbars indicate repeating decimals):[2][4][5]
- 0.006 94 square feet (1 square foot is equal to 144 square inches)
- 0.000 771 604 9382 square yards (1 square yard is equal to 1,296 square inches)
- 6.4516 square centimetres (1 square centimetre is equal to 0.155 000 310... square inches)
- 0.000 645 16 square metres (1 square metre is equal to 1,550.003 100... square inches)
- Template:SfracScript error: No such module "Check for unknown parameters". circular inches (1 circular inch is equal to Template:SfracScript error: No such module "Check for unknown parameters". square inches)
References
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Template:Imperial units Template:United States Customary Units