Convert US gallon to US fluid ounce
1 gal = 128 fl oz
sig figs
1 gal = 128 fl oz
1 gal in every volume unit
| cubic millimeter | 3,790,000 mm³ |
| microliter | 3,790,000 μL |
| milliliter | 3,790 mL |
| cubic centimeter | 3,790 cm³ |
| US teaspoon | 768 tsp |
| centiliter | 379 cL |
| US tablespoon | 256 tbsp |
| cubic inch | 231 in³ |
| imperial fluid ounce | 133 imp fl oz |
| US fluid ounce | 128 fl oz |
| deciliter | 37.9 dL |
| US cup | 16 cup |
| US pint | 8 pt |
| imperial pint | 6.66 imp pt |
| US quart | 4 qt |
| liter | 3.79 L |
| cubic decimeter | 3.79 dm³ |
| imperial quart | 3.33 imp qt |
| board foot | 1.6 fbm |
| US gallon | 1 gal |
| imperial gallon | 0.833 imp gal |
| cubic foot | 0.134 ft³ |
| US bushel | 0.107 bu |
| hectoliter | 0.0379 hL |
| US beer barrel | 0.0323 bbl beer |
| oil barrel | 0.0238 bbl |
| cubic yard | 0.00495 yd³ |
| cubic meter | 0.00379 m³ |
| kiloliter | 0.00379 kL |
| hundred cubic feet | 0.00134 CCF |
| cord | 0.00104 cord |
| acre-foot | 0.00000307 ac·ft |
| million US gallons | 0.000001 MG |
| cubic kilometer | 3.79e-12 km³ |
How the conversion works
Multiply by 128 to go from US gallon to US fluid ounce, or divide by it to go back. Every conversion on this site routes through the SI value (m³) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? US fluid ounce to US gallon: 1 fl oz = 0.0078125 gal.
US gallon to US fluid ounce: common values
| 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 |
| 1000 gal | 128,000 fl oz |