1 square mile  =640 acres 
=27,878,400 square feet  
=2.589988110336 square kilometre (exactly)  
≈260 hectares 
.This page uses Creative Commons Licensed content from Wikipedia (view authors).^
^

A square mile (sometimes written mi² ) is an American unit of measurement of area. It is the area inside a square that has each side equal to one statute mile (5,280 feet or 1,760 yards). This way of talking about area is often used to say how much land there is on a farm, or in a city or country, for example.
One square mile is just less than 2.6 square kilometres.
Here are sentences from other pages on Square mile, which are similar to those in the above article.
