The ounce (oz / â„¥) is a unit of mass. The most commonly used of which are equal to approximately 28 grams. A gallon is a measure of volume of approximately four litres.

## Gallon per ounce

- 16 ounces = 1 Pint
- 32 ounces = 1 Quart
- 128 ounces = 1 Gallon

The U.S. liquid gallon is legally defined as 231 cubic inches, and is equal to exactly 3.785411784 litres or about 0.133680555 cubic feet. This is the most common definition of a gallon in the United States. The U.S. fluid ounce is defined as 1â„128 of a U.S. gallon.