Quantity
1 acre-foot is equal to 325,829 gallons or 43,560 cubic feet
1 million gallons is equal to 3.07 acre-feet
1 cubic foot is equal to 7.48 gallons
Flow
1 million gallons per day (mgd) is equal to
694.4 gallons per minute
or 1.55 cubic feet per second
or 1,120 acre-feet per year
1 billion gallons per day (bgd) is equal to
1.12 million acre-feet per year
1 cubic foot per second is equal to 1.98 acre-feet per day
1 inch of rain yields about 27,200 gallons per acre
1 gallon of water weighs 8.34 pounds
I cubic foot of water weighs 62.38 pounds