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my question for members is : how many square miles is 1 acre?, please answer it thanks 4 all

As a previous post stated - an acre is equal to 0.00156 square miles - this is because, traditionally a square mile is equal to 640 acres.

There were a number of different measures of an acre internationally - most significantly the imperial acre, the US survey acre, and the international acre. Standardisation has resulted in the adoption of the traditional measure:

The International acre is equal to - 4046.86 sq mtrs, or, 0.00156 sq mile

Just remember that there are 640 acres in 1 square mile. So if you need to work out how many square miles are in 1 acre just divide 1 by 640:

1/640 = 0.0015625

So 1 acre is the same as 0.0015625 square miles.

From the math lesson that I got in elementary school, one acre is equal to 0.0015625 sq miles.

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