US Fluid Ounce to US Gallon Conversion Chart
| US Fluid Ounce (fl oz) | US Gallon (gallon) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 16 fl oz | 0.125 gallon | One-Pint Sixteen-Ounce Craft Beer Draft Glass | 16 × 0.0078125 = 0.125 gal-us |
| 32 fl oz | 0.25 gallon | One-Quart Thirty-Two-Ounce Motor Oil Bottle Container | 32 × 0.0078125 = 0.25 gal-us |
| 64 fl oz | 0.5 gallon | Half-Gallon Sixty-Four-Ounce Glass Brewery Growler | 64 × 0.0078125 = 0.5 gal-us |
| 96 fl oz | 0.75 gallon | Ninety-Six-Ounce Commercial Coffee Catering Caddy | 96 × 0.0078125 = 0.75 gal-us |
| 128 fl oz | 1 gallon | Standard One-Gallon Whole Milk Polyethylene Jug | 128 × 0.0078125 = 1 gal-us |
| 160 fl oz | 1.25 gallon | Five-Quart Automotive Oil Sump Service Capacity | 160 × 0.0078125 = 1.25 gal-us |
| 192 fl oz | 1.5 gallon | Six-Quart Electric Multi-Cooker Pressure Vessel | 192 × 0.0078125 = 1.5 gal-us |
| 256 fl oz | 2 gallon | Two-Gallon Garden Fertilizer Hand-Pump Jug | 256 × 0.0078125 = 2 gal-us |
| 320 fl oz | 2.5 gallon | Two-and-a-Half-Gallon Emergency Drinking Water Jug | 320 × 0.0078125 = 2.5 gal-us |
| 384 fl oz | 3 gallon | Three-Gallon Commercial Countertop Beverage Urn | 384 × 0.0078125 = 3 gal-us |
| 512 fl oz | 4 gallon | Four-Gallon Agricultural Backpack Spraying System | 512 × 0.0078125 = 4 gal-us |
| 640 fl oz | 5 gallon | Standard Five-Gallon Construction Joint Compound Pail | 640 × 0.0078125 = 5 gal-us |
| 1024 fl oz | 8 gallon | Eight-Gallon Commercial Wet-Vacuum Recovery Tank | 1024 × 0.0078125 = 8 gal-us |
| 1280 fl oz | 10 gallon | Ten-Gallon Residential Aquarium Water Volume Tank | 1280 × 0.0078125 = 10 gal-us |
| 1920 fl oz | 15 gallon | Fifteen-Gallon Compact Sedan Fuel Storage Tank | 1920 × 0.0078125 = 15 gal-us |
US Fluid Ounce to US Gallon Formula & Unit Definitions
One US fluid ounce equals exactly 0.0078125 US liquid gallons (1 fl oz = 1/128 gal). To convert US fluid ounces to US gallons, divide by 128 (or multiply by 0.0078125). Conversely, to convert US gallons to US fluid ounces, multiply by 128.
Quick Estimation: To quickly convert ounces to gallons, divide by 128. For example, 256 fluid ounces divided by 128 equals 2 gallons.
US Fluid Ounce Scale (fl oz)
US Statutory Liquid Unit- Creator & Origin: Derived from the historical English wine gallon (1/128th of a gallon).
- Standard Definition: Standardized by NIST as exactly 29.5735295625 cubic centimeters.
- Everyday Focus: Beverage cans, cosmetic bottles, cough syrups, and cocktail measures.
US Liquid Gallon Scale (gal)
US Statutory Liquid Unit- Creator & Origin: Derived from the Queen Anne wine gallon established in England in 1707.
- Standard Definition: Defined by NIST as exactly 231 cubic inches (3.785411784 liters).
- Everyday Focus: Gasoline dispensing, dairy milk jugs, paint buckets, and chemical drums.
Frequently Asked Questions
Q.How many US gallons are in one US fluid ounce?
There is exactly 0.0078125 (1/128) US liquid gallon in one US fluid ounce (1 fl oz = 0.0078125 gal).
Q.What is the formula to convert US fluid ounces to US gallons?
The formula is: US Gallons = US Fluid Ounces / 128 (or US Fluid Ounces × 0.0078125). For example, 128 fl oz / 128 = 1 gal.
Q.How do I reverse this calculation from US gallons to US fluid ounces?
To convert US gallons back to US fluid ounces, multiply by 128. You can also use our US Gallon to US Fluid Ounce Converter.
Q.Is fluid ounce weight or volume?
Fluid ounce is strictly a unit of volume, representing 1/128th of a US gallon, while avoirdupois ounce measures weight.