None. Cubic feet are a volume unit which has nothing to do with a two-dimensional area of a square mile. You need a third dimension for a cubic measurement.
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1 cubic mile = 1.10111715 × 1012 US gallons.
Acres and milesFirst, you should never say "square acre." The acre is a unit of area, so there is no need to qualify it with the word square. A mile, on the other hand, is a unit of distance, so the square mile is the unit of area. Now, to answer the question.There are 640 acres per square mile. So, the square mile is larger -- exactly 640 times as large.
The United States Geologic Survey (USGS) estimates there to be 326,000,000 cubic miles of water on the planet. A cubic mile can hold a little more than 1.1 X 1012 gallons. The USGS also estimates that 96.5% of that water is in the planets oceans. 96.5% X (1,100,000,000,000 gallons per cubic mile) X (326,000,000 cubic miles) =============================== = 346,049,000,000,000,000,000 gallons.
Unfortunately you can't compare acers with miles, because "acre" is a square measure, a mile describes a distance.
Big Island (Hawai'i) 4,028 square milesMaui 727 square milesOahu 597 square milesKauai 562 square milesMolokai 260 square milesLanai 140 square milesNi'ihau 69.5 square milesKaho'olawe 44 square milesThere are 640 acres in one square mile. There are other very small islands that are part of the state of Hawai'i, but the above are the main islands. Aloha-