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# how to convert acre to square mile

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Question:Total U.S. farmland occupies 954 million acres. How many square miles is this? (1 acre = 43,560feet squared , 1 mile= 5280ft ). A=? miles squared?

Answers:Since there are 640 acres per square mile (by definition), then all you have to do is the following calculation: 954,000,000 640 = 1,490,625 954 million acres is equal to just under 1.5 million square miles.

Question:

Answers:Go to this site and download the converter.exe program; it will convert area, distance, weight, power, etc all for free. I am an engineer and use this program frequently. Accurate, fast and free...an engineer's dream! BTW 100 acres = 0.15625 miles

Question:The volume of water used for crop irrigation is measured in acre-feet, where 1 acre-foot is the amount of water needed to cover 1 acre of land to a depth of 1 ft. A)If there are 640 acres per square mile, how many cubic feet of water are in 1 acre-foot? B) How many acre-feet are in Lake Erie (total volume = 116 cubic miles)?

Answers:A) (1 mile / 640 acres) x (5280 ft / 1 mile ) = 43560 ft / acre So 1 acre-foot = 43560 ft x 1 ft = 43560 ft B) Volume of Lake Erie = 116 miles 116 miles = 116 miles x (5280 ft / 1 mile ) [This gives the number of cubic feet in 116 cubic miles] So Number of acre-feet in Lake Erie = [116 miles x (5280 ft / 1 mile )] / 43560 = 391987200 acre-feet

Question:How many acres is 140 square feet?

Answers:Divide 140 by 43,560. You get 0.003214 acres.