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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 64 â¦ 0, since there are 640 acres in 1 square mile.
The answer is 0.0015625. We assume you are converting between square mile and acre. You can view more details on each measurement unit: square miles or acre. The SI derived unit for area is the square meter. 1 square meter is equal to 3.86102158542E-7 square miles, or 0.000247105381467 acre. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between square miles and acres. Type in your own numbers in the form to convert the units!