For example, to convert 10 square miles to acres, multiply 10 by 640, that makes 6400 acres is 10 square miles. You can enter the circumference and also compute radius and diameter in mils, inches, feet, yards, miles, millimeters, centimeters, meters and kilometers.. Compute area measured by square mils, square inches, square feet, square yards, square miles, acres, hectares, square millimeters, square centimeters, square meters, and square kilometers. Definition: The square mile (symbol: sq mi or mi 2) is a unit of area in the imperial and United States customary (UCS) systems of units.It is defined as the area of a square with side lengths of one statute mile (5,280 feet). This explains one definition as the area of a rectangle with sides of length one chain (66 feet) and one furlong (660 feet). What is an acre (ac)? If there are 12 acres how many miles would that be,would that be even a mile? How Big is an Acre Back to our one chain by one furlong definition — an acre is defined as 66’ (1 chain) by 660’ (1 furlong) or 43,560 square feet. Acres to Miles Calculator: Acres (ac) : Miles (mi) : Measure the radius of the circle or, if it's easier, measure the diameter and then divide that by two to get the radius. The word acre is defined as meaning open field. Miles are units of length and acres are units of area. A square mile is a large area that is equal to 27,878,400 square feet, 3,097,600 square yards, and 640 acres. Task: Convert 7,500 acres to square miles (show work) Formula: acres ÷ 640 = mi 2 Calculations: 7,500 acres ÷ 640 = 11.71875 mi 2 Result: 7,500 acres is equal to 11.71875 mi 2 Conversion Table For quick reference purposes, below is a conversion table that you can use to convert from acres to mi 2 . There are 0.0015625 square miles in an acre. Square mile. 1 square mile = 640 acres. How many acres are in 1 mile? Begin typing your city, county or metro area and then choose a location from the list of available geographies. Hi, Miles and acres measure entirely different things. There are 640 acres in a square mile. The symbol for square mile is mi 2 or sq mi. What is a Square Mile? This calculator uses this formula to determine the area underneath a center pivot. Square mile is an imperial and United States Customary area unit. The radius of the circle is the straight-line distance from its center point to any point on the circle; the diameter is the straight-line distance from any point on the circle, through the center point of the circle, and then on to the far side of the circle. In order to relate two different increments of measurements, they both must be units of the same type of measurement. An acre is a unit of area in both US Customary Units as well as the Imperial System. The symbol for acre is ac. Conversion between acres and miles. One square mile is equivalent to 640 acres. But, know that an acre is still a common land area measurement used in the US, especially in real estate and government land transactions. Using the distance measurement of one mile to define the borders of a space creates an area that is one square mile. A circular area of 5 miles radius covers 50265.5 acres(to 1 dp) Area = pi*radius2, which with radius in miles will give you area as 78.53982 square miles, then multiply by 640, since there are 640 acres in 1 square mile. Big Radius Tool; About the Data; Big Radius Tool. Using the Circumference Calculator. acre = square mile * 640. 1 Square Mile = 640 Acres. Select a radius of any value from 25 to 500 miles using the slider. sq miles to acres formula. Note: Counties are included if their center of population point falls within the selected radius. WSU Prosser - IAREC, 24106 N Bunn Rd, Prosser WA 99350-8694, 509-786-2226. A square mile is calculated as the area of a square that has 1 mile on each side. 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