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1 gal = 128 fluid ounces
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1 gallon equals 128 fluid ounces. To convert gallons to fluid ounces, multiply the value by this factor.
Formula: value × 128
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| Gallons (gal) | Fluid Ounces (fl oz) |
|---|---|
| 1 gal | 128 fl oz |
| 2 gal | 256 fl oz |
| 5 gal | 640.001 fl oz |
| 10 gal | 1,280 fl oz |
| 25 gal | 3,200 fl oz |
| 50 gal | 6,400.01 fl oz |
| 100 gal | 12,800 fl oz |
| 250 gal | 32,000 fl oz |
| 500 gal | 64,000.1 fl oz |
| 1,000 gal | 128,000 fl oz |
Enter the value above and the result appears instantly — the calculation runs entirely in your browser. Formula: value × 128.
1 gallon = 128 fluid ounces (shown to 6 significant figures — the converter itself computes at full precision). The reverse factor is 1 fluid ounce = 0.00781249 gallons.
1 gal = 128 fl oz; 10 gal = 1,280 fl oz; 100 gal = 12,800 fl oz. Use the full conversion table below for more reference values.
No, and the difference matters. This converter uses US customary measures: 1 US cup = 236.588 mL and 1 US gallon = 3.785411784 L. An imperial cup is 284 mL and an imperial gallon is 4.546 L, so recipes from the UK may need adjusting.