15 gallons contains ~76 750ml measures.
There are approximately 30.28 750ml bottles in 20 gallons of liquid.
A magnum is 1.5 litres therefore 2 standard size 750 ml bottles
600 bottles
A Nebuchadnezzar of Champagne by volume is 15 Liters, or 20 750ml bottles or 3.9625808 gallons.
There are 2 bottles in a magnum
Twelve. 750ml X 12 = 9000ml (1L = 1000ml)
Four.
One standard bottle.
65 acre-feet of water equates to 21,180,343 US gallons. This volume of water could fill 106,901,761 750mL bottles.
either 6 or 12 if they are standard 750ml bottles.
3 magnums should be enough.