Square inch
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| square inch | |
|---|---|
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| General information | |
| Unit system | Imperial, United States customary units |
| Unit of | area |
| Symbol | in2, sq in |
| Conversions | |
| 1 in2 in ... | ... is equal to ... |
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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)
- Page Template:Sfrac/styles.css has no content.π/4 circular inches (1 circular inch is equal to Page Template:Sfrac/styles.css has no content.4/π square inches)
References
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- ^ a b Page Module:Citation/CS1/styles.css has no content.Cardarelli, François (1997). Scientific Unit Conversion: A Practical Guide to Metrication. M. J. Shields. London: Springer London, Limited. ISBN 978-1-4471-3394-0.
- ^ a b c Page Module:Citation/CS1/styles.css has no content.Dresner, Stephen (1971). Units of measurement : an encyclopaedic dictionary of units, both scientific and popular, and the quantities they measure. Internet Archive. New York: Hastings House. pp. 91, 248. ISBN 978-0-8038-7496-1.
- ^ Page Module:Citation/CS1/styles.css has no content."Conversion Factors for U.S. Customary and SI (Metric) Units". Insecticide and Acaricide Tests. 4 (1): 263. 1979-01-01. doi:10.1093/iat/4.1.263. ISSN 0276-3656.
- ^ 15 U.S.C. § 205
- ^ Page Module:Citation/CS1/styles.css has no content.Blake, Alexander (1991-01-16). Handbook of Mechanics, Materials, and Structures. John Wiley & Sons. pp. 108–109. ISBN 978-0-471-86239-0.
Template:Imperial units Template:United States Customary Units
