# Square mile

The square mile is an imperial and US unit of area equal the area of a square of one statute mile. It should not be confused with the archaic miles square, which refers to the number of miles on each side squared. For instance, 20 miles square (20 x 20 miles) is equal to 400 square miles.

 1 square mile =640 acre =27878400 square feet =2.589988110336 square kilometers (exactly) ≈260 hectares

## Symbols

There is no universally agreed symbol but the following are used:
• square mile
• sq mile
• sq mi
• sq m (this can be confused with square meter)
• mile/-2
• mi/-2
• m/-2 (this can be confused with square meter)
• mile^2
• mi^2
• m^2 (this can be confused with square meter)
• mile²
• mi²
• (this can be confused with square meter)

## Conversions

1 square mile is equivalent to:
In the Public Land Survey System of the U.S. and the Dominion Land Survey of Canada, the size of a standard section of land is one square mile, but always with the marginally larger survey definition.
A square mile is a unit of area equal to the area of a square of one mile in length on each side. Other derivative meanings include:
• The City of London, being about a square mile in area.

Square may mean:

## Entertainment

• Square (album), an album by Buck 65
• Square (band), a musical trio from Lincoln, Nebraska
• Square Enix, a video game company
• Square Co.

Imperial units or the Imperial system is a collection of units, first defined in the British Weights and Measures Act of 1824, later refined (until 1959) and reduced.
U.S. customary units, also known in the United States as English units[1] (but see English unit) or standard units, are units of measurement that are currently used in the USA, in some cases alongside units from SI (the International System of Units
Area is a physical quantity expressing the size of a part of a surface. The term Surface area is the summation of the areas of the exposed sides of an object.

### Units

Units for measuring surface area include:
square metre = SI derived unit

In plane (Euclidean) geometry, a square is circle with four sides.

## Classification

A square is a regular quadrilateral. Likewise it is also a special case of a rhombus, kite, parallelogram, and trapezoid.
1 mile =
SI units
0 m 0 km
US customary / Imperial units
0 ft 0 yd

acre is a unit of area in a number of different systems, including the imperial and US customary systems. The most commonly used acres today are the international acre and, in the United States, the survey acre.

One acre comprises 4,840 square yards or 43,560 square feet.
The square foot is an Imperial unit / U.S. customary unit (non-SI non-metric) of area, used in the United States, United Kingdom and elsewhere. It is defined as the area of a square with sides of 1 foot (0.333...
Square kilometre (U.S. spelling: square kilometer), symbol km², is a decimal multiple of the SI unit of surface area, the square metre, one of the SI derived units. 1 km² is equal to:
• 1,000,000 m²
• 100 ha (hectare)
Conversely:
• 1 m² = 0.

A hectare (symbol ha, pronounced /ˌhɛkˈtɛə(ɹ)/) is a unit of area equal to 10,000 square metres, or one square hectometre, and commonly used for measuring land area.
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 foot is an Imperial unit / U.S. customary unit (non-SI non-metric) of area, used in the United States, United Kingdom and elsewhere. It is defined as the area of a square with sides of 1 foot (0.333...
The square yard is an imperial/US customary (non-metric) unit of area, formerly used in most of the English-speaking world but now generally replaced by the square metre outside of the US.
acre is a unit of area in a number of different systems, including the imperial and US customary systems. The most commonly used acres today are the international acre and, in the United States, the survey acre.

One acre comprises 4,840 square yards or 43,560 square feet.
square metre (also spelled meter, see spelling differences) is the SI derived unit of area, with symbol m². It is defined as the area of a square whose sides measure exactly one metre.
square metre (also spelled meter, see spelling differences) is the SI derived unit of area, with symbol m². It is defined as the area of a square whose sides measure exactly one metre.
Square kilometre (U.S. spelling: square kilometer), symbol km², is a decimal multiple of the SI unit of surface area, the square metre, one of the SI derived units. 1 km² is equal to:
• 1,000,000 m²
• 100 ha (hectare)
Conversely:
• 1 m² = 0.

The Public Land Survey System (PLSS) is a method used in the United States to survey and identify land parcels, particularly for titles and deeds of rural, wild or undeveloped land. Its basic units of area are the township and section.
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