gal to fl oz
Convert Gallon to Fluid Ounce
Convert Gallon to Fluid Ounce instantly with the tool above. The conversion factor is 128, meaning 1 gallon equals 128 fluid ounces. Type any value and the result updates immediately — no ads, no page reloads, no clutter.
Type a number above. The result updates instantly — no buttons, no reloads.
1 Gallon = 128 fluid ounces
1 Fluid Ounce = 0.0078125 gallons
Quick reference
Common gallons converted to fluid ounces at a glance.
| gal | fl oz |
|---|---|
| 1 | 128 |
| 2 | 256 |
| 5 | 640 |
| 10 | 1,280 |
| 25 | 3,200 |
| 50 | 6,400 |
| 100 | 12,800 |
| 500 | 64,000 |
| 1,000 | 128,000 |
How to convert gallons to fluid ounces
To convert a value from gallons to fluid ounces, multiply the gallon value by 128 fluid ounces. For example, 10 gallons × that factor = 1,280 fluid ounces.
This gallon to fluid ounce converter runs entirely in your browser, so results appear instantly with no page reload, no advertisements and no sign-up.
Frequently asked questions
How many fluid ounces are in 1 gallon?+
1 gallon is equal to 128 fluid ounces.
How do you convert gallons to fluid ounces?+
To convert gallons to fluid ounces, multiply the gallon value by 128. For example, 10 gallons × 128 = 1,280 fluid ounces.
What is the formula to convert gallons to fluid ounces?+
Gallon → Fluid Ounce: value × 128. Equivalently, 1 gallon = 128 fluid ounces.
Is this Gallon to Fluid Ounce converter free to use?+
Yes. This gallon to fluid ounce converter is completely free, works instantly in your browser, and contains no advertisements, popups or sign-up.