How to Convert Fluid Ounces to Gallons
To convert fluid ounces to gallons, divide the value by 128.
The Formula
Gallons = Fluid Ounces ÷ 128
Key Fact
1 gallon = 128 fluid ounces
Tip: To convert gallons back to fluid ounces, multiply by 128.
Fluid Ounces to Gallons
Convert fluid ounces (fl oz) to gallons (gal) with formulas, examples, and conversion tables.
fl oz
gal
1 fl oz = 0.007812 gal
Full precision:0.0078125 gal
Step-by-Step Solution
To convert 1 fluid ounces to gallons, we divide by 128 because one gallon equals exactly 128 fluid ounces.
1 gallon = 128 fluid ounces
Since there are 128 fluid ounces in every gallon, we divide our value by this factor:
1 ÷ 128 = 0.007812 gallons
So 1 fluid ounces = 0.007812 gallons.
Quick check: 0.007812 × 128 = 1 fluid ounces
Example Conversions
Example 1: 1 fl oz = 0.007812 gal
1 ÷ 128 = 0.007812
1 ÷ 128 = 0.007812
Example 2: 5 fl oz = 0.039062 gal
5 ÷ 128 = 0.039062
5 ÷ 128 = 0.039062
Example 3: 10 fl oz = 0.078125 gal
10 ÷ 128 = 0.078125
10 ÷ 128 = 0.078125
Fluid Ounces to Gallons Table
| Fluid Ounces | Gallons |
|---|---|
| 1 fl oz | 0.007812 gal |
| 2 fl oz | 0.015625 gal |
| 5 fl oz | 0.039062 gal |
| 10 fl oz | 0.078125 gal |
| 20 fl oz | 0.15625 gal |
| 25 fl oz | 0.19531 gal |
| 50 fl oz | 0.39062 gal |
| 100 fl oz | 0.78125 gal |
| 250 fl oz | 1.9531 gal |
| 500 fl oz | 3.9062 gal |
| 1000 fl oz | 7.8125 gal |
1 Fluid Ounce in Other Units
| Unit | 1 fl oz = |
|---|---|
| Fluid Ounces to Milliliters | 29.5735 mL |
| Fluid Ounces to Liters | 0.029573 L |
| Fluid Ounces to Deciliters | 0.29573 dL |
| Fluid Ounces to Centiliters | 2.9573 cL |
| Fluid Ounces to Teaspoons | 6 tsp |
| Fluid Ounces to Tablespoons | 2 tbsp |
| Fluid Ounces to Cups | 0.125 cup |
| Fluid Ounces to Pints | 0.0625 pt |
| Fluid Ounces to Quarts | 0.03125 qt |
| Fluid Ounces to Gallons | 0.0078125 gal |
| Fluid Ounces to Teaspoons (UK) | 4.996 tsp(UK) |
| Fluid Ounces to Tablespoons (UK) | 1.6653 tbsp(UK) |
| Fluid Ounces to Cups (UK) | 0.10408 cup(UK) |