There are exactly 128 fluid ounces in a US gallon. Use the chart and calculator below for any amount.
| Gallons | Fluid Ounces | Cups | Liters |
|---|---|---|---|
| ⅛ gallon | 16 fl oz | 2 cups | 0.47 L |
| ¼ gallon | 32 fl oz | 4 cups | 0.95 L |
| ½ gallon | 64 fl oz | 8 cups | 1.89 L |
| ¾ gallon | 96 fl oz | 12 cups | 2.84 L |
| 1 gallon | 128 fl oz | 16 cups | 3.79 L |
| 2 gallons | 256 fl oz | 32 cups | 7.57 L |
| 5 gallons | 640 fl oz | 80 cups | 18.93 L |
| Fluid Ounces | Gallons | Quarts | Pints |
|---|---|---|---|
| 8 fl oz | ⅟₁₆ gal | ¼ qt | ½ pint |
| 16 fl oz | ⅛ gal | ½ qt | 1 pint |
| 32 fl oz | ¼ gal | 1 qt | 2 pints |
| 64 fl oz | ½ gal | 2 qt | 4 pints |
| 128 fl oz | 1 gallon | 4 qt | 8 pints |
| 256 fl oz | 2 gallons | 8 qt | 16 pints |
How many ounces in a gallon?
There are 128 fluid ounces in 1 US gallon.
How many ounces in half a gallon?
There are 64 fluid ounces in half a gallon.
How many water bottles is a gallon?
A standard 16.9 oz water bottle means you need about 7.57 bottles to make a gallon.
How many cups in a gallon?
There are 16 cups in a gallon, which equals 128 fluid ounces.
How many gallons is 64 oz?
64 oz is half a gallon (0.5 gallons).