The symbol for acre is ac. For example, to convert 10 square miles to acres, multiply 10 by 640, that makes 6400 acres is 10 square miles. 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). Using the Circumference Calculator. 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. Where: = Area in acres = Pivot length in ft = pi or 3.14159 . 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. If there are 12 acres how many miles would that be,would that be even a mile? Note: Counties are included if their center of population point falls within the selected radius. A square mile is calculated as the area of a square that has 1 mile on each side. What is a Square Mile? A square mile is a large area that is equal to 27,878,400 square feet, 3,097,600 square yards, and 640 acres. The symbol for square mile is mi 2 or sq mi. But, know that an acre is still a common land area measurement used in the US, especially in real estate and government land transactions. Conversion between acres and miles. In order to relate two different increments of measurements, they both must be units of the same type of measurement. There are 640 acres in a square mile. Acres to Miles Calculator: Acres (ac) : Miles (mi) : End Gun Throw Radius: Irrigated Area of Full Circle: The Equation. Begin typing your city, county or metro area and then choose a location from the list of available geographies. Square mile is an imperial and United States Customary area unit. There is a connection between acres and SQUARE miles. 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. The acre was approximately the amount of land estimated tillable by one man plowing behind an ox in one day. 1 Square Mile = 640 Acres. The word acre is defined as meaning open field. This calculator uses this formula to determine the area underneath a center pivot. 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. One square mile is equivalent to 640 acres. WSU Prosser - IAREC, 24106 N Bunn Rd, Prosser WA 99350-8694, 509-786-2226. There are 0.0015625 square miles in an acre. Miles are units of length and acres are units of area. What is an acre (ac)? How many acres are in 1 mile? Measure the radius of the circle or, if it's easier, measure the diameter and then divide that by two to get the radius. Square mile. Square miles and acres are both measurements of area. An acre is a unit of area in both US Customary Units as well as the Imperial System. 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 . 1 square mile = 640 acres. Hi, Miles and acres measure entirely different things. acre = square mile * 640. sq miles to acres formula. 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