How many sq feet in an acre

Google is your friend (http://www.google.co.uk/search?hl=en&q=square+feet+in+1+acre&btnG=Google+Search&meta=)

How many sq feet in an acre
To the nearest one 43559 sq ft.

ceblinn, you are incorrect, there are exactly 43560 sq feet in an acre by definition.

Agree with capuchin, disagree with ceblinn.

1 acre \equiv 43560 ft^2

43,560