square mile
{{redirect|Mile square|other uses|Mile square (disambiguation)|and|Square mile (disambiguation)}}
{{Short description|Unit of area}}
{{Infobox unit
| name = square mile
| image = Indy farmland.jpg
| caption = Aerial photograph of Indiana farmland, with each small square being one square mile. (see Section (United States land surveying))
| standard = Imperial, United States customary units
| quantity = area
| symbol = mi2
| symbol2 = sq mi
| inunits1 = {{ubl|{{val|4.0145|e=9|u=sq in}}|{{val|2.7878|e=7|u=ft2}}|{{val|3.0976|e=6|u=yd2}}||{{val|640|u=acres}}}}
| units2 = SI units
| inunits2 = {{ubl|{{val|2.59|e=6|u=m2}}|{{val|2.59|u=km2}}}}
}}
The square mile (abbreviated as sq mi and sometimes as mi2)Rowlett, Russ (September 1, 2004). [http://www.unc.edu/~rowlett/units/dictS.html "S", How Many? A Dictionary of Units of Measurement]. University of North Carolina at Chapel Hill. Retrieved February 22, 2012. is an imperial and US unit of measure for area. One square mile is equal to the area of a square with each side measuring a length of one mile.{{cite book
|title= Mathematical dictionary and cyclopedia of mathematical science
|last= Davies
|first= Charles
|year= 1872
|publisher= A.S. Barnes and co
|location= Original from Harvard University
|page= [https://archive.org/details/mathematicaldic00unkngoog/page/n586 582]
|url= https://archive.org/details/mathematicaldic00unkngoog }}
Equivalents
File:Comparison of units of area.png
One square mile is equal to:
- 4,014,489,600 square inches{{cite book|author=François Cardarelli|url=https://archive.org/details/encyclopaediaofs0000card|title=Encyclopaedia of scientific units, weights, and measures: their SI equivalences and origins|publisher=Springer|year=2003|isbn=978-1-85233-682-0|page=[https://archive.org/details/encyclopaediaofs0000card/page/3 3]|access-date=22 February 2012|url-access=registration}}
- {{Convert|1|mi2|ft2|0|abbr=off|lk=out|disp=out}}
- {{Convert|1|mi2|yd2|0|abbr=off|lk=out|disp=out}}
- {{Convert|1|mi2|rood|0|abbr=off|lk=out|disp=out}}
- {{Convert|1|mi2|acre|0|abbr=off|lk=out|disp=out}}
One square mile is also equivalent to:
- {{Convert|1|mi2|m2|99|abbr=off|lk=out|disp=out}}
- {{Convert|1|mi2|ha|99|abbr=off|lk=out|disp=out}}
- {{Convert|1|mi2|km2|99|abbr=off|lk=out|disp=out}}
Similarly named units
= Miles square =
Square miles should not be confused with miles square, a square region with each side having a length of the value given. For example, a region which is 20 miles square ({{Val|20|u=miles}} × {{Val|20|u=miles}}) has an area of {{Val|400|u=mi2}}; a rectangle of measuring {{Val|10|u=miles}} × {{Val|40|u=miles}} also has an area of {{Val|400|u=mi2}}, but is not 20 miles square.
= Section =
In the United States Public Land Survey System, "square mile" is an informal synonym for section.
References
{{Reflist}}
- [http://www.formulaconversion.com/formulaconversioncalculator.php?convert=squaremiles_to_acres Formula Conversion, Square miles to numerous area units with algebraic steps and unit cancellation shown]
{{Imperial units}}
{{United States Customary Units}}
{{DEFAULTSORT:Square Mile}}
Category:Customary units of measurement in the United States