What is "square mile"

n. A unit of area (''abbreviation'' '''sq mi''' ''or'' '''sq. mi.''' ''or'' '''mi²''') equal to the area of a square the sides of which are each one mile long.

n. an area of 640 acres

The square mile (abbreviated as sq mi and sometimes as mi) is an imperial and US unit of measure for an area equal to the area of a square of one statute mile. It should not be confused with miles square, which refers to a square region with each side having the specified length. For instance, 20 miles square (20 × 20 miles) has an area equal to 400 square miles; a rectangle of 10 × 40 miles likewise has an area of 400 square miles, but it is not 20 miles square.

One square mile is equal to:

• 4,014,489,600 square inches
• 27,878,400 square feet
• 3,097,600 square yards
• 640 acres
• 2560 roods

A square mile is equivalent to the following metric measures:

• 25,899,881,103.36 square centimetres
• 2,589,988.110336 square metres
• 258.9988110336 hectares
• 2.589988110336 square kilometres

When applied to a portion of the earth's surface, which is curved rather than flat, "square mile" is an informal synonym for section.

Romans derived measurements from marching. Five feet was equal to one pace (which is appropriately a double step). 1,000 paces measured a Roman mile, which was somewhat smaller than the English statute mile. This Roman system was adopted, with local variations, throughout Europe as the Roman Empire spread.

Total population in a square mile is derived by dividing the total number of residents by the number of square miles of land area in the specified geographic area. The population per square kilometer is derived by multiplying the population per square mile by 0.3861.

Land area measurements are originally recorded as whole square meters. Square meters are converted to square kilometers by dividing by 1,000,000; square kilometers are converted to square miles by dividing by 2.58999; square meters are converted to square miles by dividing by 2,589,988.

A square mile is a unit of area equal to the area of a square of one mile in length on each side.

Square mile may also refer to:

• The City of London, nicknamed the "Square Mile", being about a square mile in area
  • Square Mile (magazine), a magazine marketed to City of London bankers
• Square Mile (board game), land development game released by Milton Bradley Company in 1962
• A day-to-day name for a section of a survey township
• "Square Mile" or Golden Square Mile, an historic area on Sherbrooke Street in downtown Montreal
• The Antwerp diamond district, an area within the city of Antwerp, Belgium
• Square Mile, South Australia, a locality in the local government area of the District Council of Grant

Square Mile was the land development board game released by Milton Bradley in 1962. It is for 2 - 4 players ages 12 to adult.

Square Mile is a monthly British lifestyle and business magazine distributed to those working in the City of London's financial industry.