How to convert US gallons to US fluid ounces
fl oz = gal × 128
One US gallon equals 128 fl oz, so multiply the value in US gallons by 128. Example: 10 gal = 1,280 fl oz.
The US gallon is exactly 231 cubic inches (3.785411784 L) and the imperial (UK) gallon is exactly 4.54609 L, so US and UK pints and gallons are not the same size.
US gallons to US fluid ounces conversion table
| US gallons (gal) | US fluid ounces (fl oz) |
|---|---|
| 1 gal | 128 fl oz |
| 2 gal | 256 fl oz |
| 3 gal | 384 fl oz |
| 5 gal | 640 fl oz |
| 10 gal | 1,280 fl oz |
| 15 gal | 1,920 fl oz |
| 20 gal | 2,560 fl oz |
| 25 gal | 3,200 fl oz |
| 50 gal | 6,400 fl oz |
| 75 gal | 9,600 fl oz |
| 100 gal | 12,800 fl oz |
| 250 gal | 32,000 fl oz |
| 500 gal | 64,000 fl oz |
| 1,000 gal | 128,000 fl oz |
More volume conversions
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