Kitchen conversion
how many ounces in a gallon
Quick answer
There are 128 fluid ounces in 1 gallon.
Fluid ounce → Gallon
Result
128 fl oz
1 gal → Fluid ounce
There are 128 fluid ounces in 1 gallon. Use the calculator below to change the amount, switch units, or convert a full recipe list while cooking.
This is a direct volume conversion using standard US kitchen units — no ingredient needed.
Tip: for baking, weighing in grams is more consistent than cups. Convert once, then scale the recipe up or down without re-measuring every spoon.
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FAQ
How Many Ounces In A Gallon?
There are 128 fluid ounces in 1 gallon.
Is this fl oz to gal conversion exact?
Yes for pure volume units using standard US kitchen measures.
US cup or metric cup?
This site uses the US legal cup (240ml-class cooking cup ≈ 236.588 ml) common in American recipes.