How Many Fluid Ounces in a Gallon?

Round:
Enter US Fluid Ounce
Enter US Fluid Gallon

How many fluid ounces in a gallon?

There are three types of gallons in use today: United States Customary fluid, dry gallons and the British imperial gallon.

There are two types of fluid ounces in use today: United States Customary fluid ounce and the British Imperial fluid ounce.

United States Customary:

There are 128 fluid ounces in a US fluid gallon and 148.946 fluid ounces in a US dry gallon.

1 US Fluid Gallon = 128 US Fluid Ounces
1 US Dry Gallon = 148.946 US Fluid Ounces

To convert US fluid gallons to US fluid ounces, multiply the fluid gallon value by 128.

To convert US dry gallons to US fluid ounces, multiply the dry gallon value by 148.946.

British Imperial:

There are 160 imperial fluid ounces in an imperial gallon.

1 Imperial Gallon = 160 Imperial Fluid Ounces

To convert imperial gallons to imperial fluid ounces, multiply the imperial gallon value by 160.

What is a gallon?

Gallon is an imperial and US Customary measurement system volume unit. There is one type of gallon in the imperial system and 2 types (fluid and dry) in the US Customary measurement system. 1 US fluid gallon is defined as 231 cubic inches, 1 US dry gallon is 268.8 cubic inches and 1 imperial gallon is 277.4 cubic inches. The abbreviation is "gal".

What is a fluid ounce (fl oz)?

Fluid ounce is an imperial and US Customary measurement system volume unit. 1 US fluid ounce equals to 29.5735 mL and 1 imperial (UK) fluid ounce equals to 28.4131 mL. The abbreviation is "fl oz".

Create Custom Conversion Table
To create your own custom conversion table click "Create Table" botton. To change values, you may enter a "Start" value (1, 2.5, 5 etc), select a an "Increment" value (0.01, 5, 100 etc) and select an "Accuracy" value to round the result.