Gallons to Fluid Ounces Conversion

How many ounces in a gallon?

Gallons to ounces conversion factors are listed below (for US, UK and for both fluid and dry measurements). To find out how many ounces in a gallon, multiply by the conversion factors or instead, use the converter if the conversion is from US fluid gallons into US fluid ounces. If scroll down, you may also create and print your own custom conversion table create your table.

1 Gallon [Fluid, US] = 128 Ounces [Fluid, US]
1 Gallon [Dry, US] = 148.94684 Ounces [Fluid, US]
1 Gallon [UK] = 160 Ounces [UK]

For example, to find out how many ounces there are in a half (1/2) gallon, multiply the gallon value by the conversion factor, (1/2) * 128 = 64 fl. ounces.

For US fluid gallons, there are 16 oz in 1/8 US gallon, 32 oz in a quarter (1/4) US gallon, 42.6 oz in 1/3 US gallon, 85.3 oz in 2/3 US gallon and 96 oz in 3/4 US gallon.

For UK gallons, there are 20 oz in 1/8 UK gallon, 40 oz in a quarter (1/4) UK gallon, 53.3 oz in 1/3 UK gallon, 106.6 oz in 2/3 UK gallon and 120 oz in 3/4 UK gallon.

Gallon is unit of volume in imperial and U.S. customary systems. An imperial gallon is officially defined as equal in volume to 10 avoirdupois pounds (4.53 kg) of distilled water weighed at 62 degrees Fahrenheit (16.66 degrees Celsius) with barometer at 30 inches or equal to 277.421 cubic inches. The U.S. gallon is defined as 231 cubic inches or 8.3389 avoirdupois pounds (3.78 kg) of distilled water at its maximum density, and with the barometer at 30 inches. Gallon is the largest unit of volume in U.S. customary and imperial measurement systems. The imperial gallon is 17% larger than the U.S. gallon.

After the metric system is adapted, it is replaced with the liter (litre) which is a SI accepted volume unit in metric system. In U.S. customary system, there are two types of gallons (fluid and dry) and they are different in sizes, in imperial system there is only one type of gallon. The abbreviation is "gal".

Fluid ounce is an imperial and U.S. customary measurement system volume unit. Fluid ounce is the smallest unit of volume in imperial and U.S. customary systems. U.K. fluid ounce equals to one twentieth of a pint and U.S. fluid ounce equals to one sixteenth of a U.S. pint. Fluid ounces are different than the ounces (oz) which is a mass (weight) unit. The abbreviation is "fl oz".

Converter

Enter a US fluid gallon value that you want to convert into fluid ounces and click on the "convert" button.

For fl. ounces to gallons converter, go to ounces to gallons

For all volume units, go to volume conversion

Create Custom Conversion Table

Conversion Table [Fluid, US]

GallonFl. OunceGallonFl. OunceGallonFl. OunceGallonFl. Ounce
1128263328516528769728
2256273456526656779856
3384283584536784789984
45122937125469127910112
56403038405570408010240
67683139685671688110368
78963240965772968210496
810243342245874248310624
911523443525975528410752
1012803544806076808510880
1114083646086178088611008
1215363747366279368711136
1316643848646380648811264
1417923949926481928911392
1519204051206583209011520
16204841524866844810012800
17217642537667857612516000
18230443550468870415019200
19243244563269883217522400
20256045576070896020025600
21268846588871908825032000
22281647601672921630038400
23294448614473934450064000
24307249627274947275096000
2532005064007596001000128000