average length of a city block
City Blocks differ in size, but the typical square city block reaches 16 or 17 per mile, or 2.21 to 2.50 Acres. Engineers use a typical city block as 100,000 sq. ft. for calculation estimates, which is about 17 blocks per mile or 2 1/4 acres. (A football field is 300 feet by 160 feet, which is 1.1 Acres.)