16 bottles. There is 128 ounces in a gallon, so you divide 128 ounces by 8 ounces in a bottle to get 16. Another way to think about it is 8 goes into 128 16 times, therefore you will need 16 8 ounce bottles to make a gallon (128 ounces).
There are four quarts in a gallon, you'll need 1/4 ounce.
"Bottled waters" is not a volume measurement. A gallon is a volume measurement. There are bottles that hold one gallon, in this case the answer is one. There are bottles that hold a half gallon, in this case the answer is two. There are bottles that hold a pint, in this case the answer is eight. There are bottles that hold 12 oz, in this case the answer is five and a third. There are bottles that hold a 8 oz, in this case the answer is eight.
isn't a 5 gallon bottle meant to hold 5 gallons of anything?
About 7.56 500mL bottles per gallon.
One fluid ounce
7.574 bottles (rounded)
One gallon is 3.78541178 Liters You have 3 liters. You need roughly another 3/4 of a liter to have a gallon.
One fluid ounce is 0.0078125 gallon.
One gallon = 128 fluid ounces Therefore, there is 1/128 gallons in one ounce. 1/128 = 0.0078125
Now that depends entirely on how big the bottles are.
You would have to drink about 7.6 1/2-liter bottles to equal one gallon.