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Volume
Gallons to Fluid ounces
Convert gallons (gal) to fluid ounces (fl oz). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 gal = 128 fl oz
Gallons to Fluid ounces Conversion Table
Common values, ready to copy:
| gallons | fluid ounces |
|---|---|
| 1 gal | 128 fl oz |
| 2 gal | 256 fl oz |
| 5 gal | 640 fl oz |
| 10 gal | 1280 fl oz |
| 25 gal | 3200 fl oz |
| 50 gal | 6400 fl oz |
| 100 gal | 12800.01 fl oz |
| 1,000 gal | 128000.07 fl oz |
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Formula
fluid ounces = gallons × 1.28000068e+2
Volume conversions use US customary measure (the cup, fluid ounce, and gallon are US definitions, not imperial). 1 US cup = 236.588 mL, 1 US gallon = 3.785411784 L.
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