Convert Gallons to Fluid Ounces
1 gal = 128 fl oz
Conversion Table
| gallons (gal) | fluid ounces (fl oz) |
|---|---|
| 0.5 | 64 |
| 1 | 128 |
| 2 | 256 |
| 5 | 640 |
| 10 | 1280 |
| 25 | 3200 |
| 50 | 6400 |
| 100 | 12800.01 |
| 250 | 32000.02 |
| 500 | 64000.03 |
| 1000 | 128000.07 |
How to Convert gallons to fluid ounces
To convert gallons to fluid ounces, multiply the value by the conversion factor:
For example: 10 gal = 1280 fl oz
About gallons and fluid ounces
The Conversion Formula
To convert gallons to fluid ounces, multiply the value by the conversion factor: 1 gal = 128 fl oz. For a worked example, suppose you need to convert 25 gal to fluid ounces: 25 × 128 = 3200 fl oz. To convert in the opposite direction, divide by 128, or equivalently multiply by 0.0078125.
About gallons
The gallon is a unit with a split personality. The US Gallon (approx. 3.785 L) is based on the pre-1824 English wine gallon. The Imperial Gallon (approx. 4.546 L) used in the UK is about 20% larger. This divergence happened when Britain updated its standards in 1824, but the newly independent US stuck with the old wine gallon. Today, the US gallon is the standard for fuel and milk in the United States. gallons are commonly used in Gasoline sales (US), Milk jugs (US), Paint buckets, and Water consumption tracking, Aquarium sizes.
A large milk jug in the US is 1 gallon.
About fluid ounces
The fluid ounce (fl oz) is a volume unit, not to be confused with the ounce (oz) of weight. In the US system, 8 fluid ounces make a cup, and 16 fluid ounces make a pint. It is the standard unit for beverage labeling in the US. Interestingly, a US fluid ounce of water weighs slightly more than one ounce by weight (approx. 1.04 oz), whereas in the Imperial system, 1 fl oz of water weighs exactly 1 oz. fluid ounces are commonly used in Soda cans (12 fl oz), Perfume bottles, Shampoo and lotion, and Bar measurements (shots), Medicine liquids.
A standard soda can contains 12 fluid ounces.
When Would You Convert gallons to fluid ounces?
Converting between gallons and fluid ounces is one of the most common volume conversions. You might need this conversion when working with international specifications, following instructions written for a different measurement system, or comparing values across different standards. Having the conversion factor (1 gal = 128 fl oz) memorized or bookmarked can save time in professional and everyday contexts alike.