1 square mile 5280ft x 5280ft that makes up 1 tile...
Or to break a tile down it's as follows:
1 square tile is equivalent to:
* 4,014,489,600 square inches
* 27,878,400 square feet
* 3,097,600 square yards
* 640 acres
* 2560 roods
* 25,899,881,103.36 square centimetres
* 2,589,988.110336 square metres
* 2.589988110336 square kilometres
midi