18 fl oz is 0.532324 liters
basically,18 US fluid ounces = 0.532323532 litre
If there are 33.814 ounces in a Liter, then there are 25.259 ounces in a fifth (or 750 mL)
Litres measure volume, ounces measure weight (mass). You can't equate the two.
72 ounces is 2.04574 liters.
12 ounces = about 0.3549 liters.
0.25 liters = about 8.454 ounces.
94.7 ounces are in 2.8 liters.
1.78 liters is about 60 ounces.
There are 7.09 liters in 240 ounces.
38 ounces=1.12379412 liters
45 ounces = about 1.331 liters.