1 acre = 43,560 square feet. 1 square mile = 5280x5280 = 27,878,400 square feet.
Thus there are 640 acres per square mile. So 4 acres = 0.00625 square miles.
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There are 4840 square yards in 1 acre.
One acre comprises 43,560 square feet.
One acre is equal to 43,560 square feet.
There are 43,560 square feet in one acre.
There are 1,742.4 square feet in one-sixteenth acre.