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Water Equivalents

1 cubic foot = 7.48 gallons = 62.4 pounds 
100 cubic feet = 1 ccf (std. bill unit) = 748 gallons 
1 acre-foot* = 43,560 cubic feet = 325,900 gallons 
1 cubic foot per second (cfs) = 450 gallons per minute
1 cfs = 646,320 gallons per day 
1 cfs for 24 hours = 1.983 acre-feet
1 cfs for 30 days = 59.5 acre-feet
1 cfs for one year = 724 acre-feet 
1 million gallons = 3.07 acre feet 
1 million gallons per day (mgd) = 1,120 acre feet per year 
1000 gallons per minute = 2.23 cfs
1000 gallons per minute = 4.42 acre-feet per day