acre

One acre comprises 43,560 square feet...

If you need to convert units in the future, Google will perform these operations automatically.

Try on Google search on "1 acre in square feet."

My method of remembering this is from high school history--the homestead act stated that a township is 16 square miles and that a square mile is 640 acrea--it went on to state that so much of each township is commons (schools, township house, mail, etc.), but for some reason 640 acres in a square mile always stuck in my head. Now a mile is 5280 feet, so a square mile is (5280^2) ft^2 and this is 640 acrea--so one acre is (5280^2/640) ft^2.

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