Gallons to Ounces Conversion - How many ounces in a gallon?

1 US fluid gallon is equal to 128 US fluid ounces. 1 Imperial (UK) gallon is equal to 160 imperial fluid ounces.

Quick Lookup (Round: 2). US fl. gallon to US fl. oz

US fl. gal 1/8 1/4 1/2 3/4 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 10 20 30 40 50 60 70 80 90 100
US fl. oz 16 32 64 96 128 140.8 153.6 166.4 179.2 192 204.8 217.6 230.4 243.2 256 268.8 281.6 294.4 307.2 320 332.8 345.6 358.4 371.2 384 396.8 409.6 422.4 435.2 448 460.8 473.6 486.4 499.2 512 524.8 537.6 550.4 563.2 576 588.8 601.6 614.4 627.2 640 652.8 665.6 678.4 691.2 704 716.8 729.6 742.4 755.2 768 780.8 793.6 806.4 819.2 832 844.8 857.6 870.4 883.2 896 908.8 921.6 934.4 947.2 960 972.8 985.6 998.4 1011.2 1024 1036.8 1049.6 1062.4 1075.2 1088 1100.8 1113.6 1126.4 1139.2 1152 1164.8 1177.6 1190.4 1203.2 1216 1228.8 1241.6 1254.4 1267.2 1280 2560 3840 5120 6400 7680 8960 10240 11520 12800

Quick Lookup (Round: 2). UK gallon to UK fl. oz

UK gal 1/8 1/4 1/2 3/4 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 10 20 30 40 50 60 70 80 90 100
UK fl. oz 20 40 80 120 160 176 192 208 224 240 256 272 288 304 320 336 352 368 384 400 416 432 448 464 480 496 512 528 544 560 576 592 608 624 640 656 672 688 704 720 736 752 768 784 800 816 832 848 864 880 896 912 928 944 960 976 992 1008 1024 1040 1056 1072 1088 1104 1120 1136 1152 1168 1184 1200 1216 1232 1248 1264 1280 1296 1312 1328 1344 1360 1376 1392 1408 1424 1440 1456 1472 1488 1504 1520 1536 1552 1568 1584 1600 3200 4800 6400 8000 9600 11200 12800 14400 16000
Round:
Enter US Fluid Gallon
Enter US Fluid Ounce
Enter Imperial Gallon
Enter Imperial Fluid Ounce

How many ounces in a gallon?

1 US fluid gallon = 128 US fluid ounces. 1 US dry gallon = 148.946 US fluid ounces. 1 Imperial gallon = 160 imperial fluid ounces.

How to convert from gallons to ounces?

To convert from gallons to ounces, as a formula multiply the number of gallons "x" by 128 for US fluid gallon, 148.946 for US dry gallon and 160 for the imperial (UK) gallon.

To find out how many US fluid ounces in "x" US fluid gallons, as a formula multiply the US fluid gallon value "x" by 128.

US Fluid Ounce = US Fluid Gallon × 128

To find out how many US fluid ounces in "x" US dry gallons, as a formula multiply the US dry gallon value "x" by 148.946.

US Fluid Ounce = US Dry Gallon × 148.946

To find out how many imperial fluid ounces in "x" imperial gallons, as a formula multiply the imperial gallon value "x" by 160.

Imperial Fluid Ounce = Imperial Gallon × 160

For example, to find out how many fluid ounces there are in 5 US fluid gallons, multiply 5 by 128, that makes 640 fluid ounces in 5 US fluid gallons.

You may also use this volume units conversion tool to convert between US, imperial gallons and fluid ounces to find out how many ounces in "x" gallons in different countries and the measurement systems.

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".

Gallons Conversion:

1 Gallon = 4 Quarts
1 Gallon = 8 Pints
1 Gallon = 16 Cups
1 Gallon = 256 Tablespoons
1 Gallon = 768 Teaspoons

There are 4 quarts in a gallon in US Customary and the imperial system. If you would like to convert quarts and gallons please check gallons to quarts page to find out how many quarts in "x" gallons.

There are 16 cups in a gallon in US Customary and the imperial system. If you would like to convert cups and gallons please check gallons to cups page to find out how many cups in "x" gallons.

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".

There are 8 fluid ounces in a US cup and 10 imperial fluid ounces in an imperial cup. If you would like to convert fluid ounces and cups please check cups to ounces page to find out how many ounces in "x" cups.

The list for your reference:

1 US Fluid Gallon = 128 US Fluid Ounces
1 US Dry Gallon = 148.946 US Fluid Ounces
1 Imperial Gallon (UK) = 160 Imperial Fluid Ounces (UK)

Compare US & Imperial Gallons:

1 Imperial Gallon = 1.2 US Fluid Gallon
1 Imperial Gallon = 1.03 US Dry Gallon
1 US Fluid Gallon = 0.83 Imperial Gallon
1 US Fluid Gallon = 0.86 US Dry Gallon
1 US Dry Gallon = 0.97 Imperial Gallon
1 US Dry Gallon = 1.16 US Fluid Gallon

US Fluid Gallons to Ounces:

1/8 gal = 16 fl oz
1/4 gal = 32 fl oz
1/2 gal = 64 fl oz
1 gal = 128 fl oz
3/2 gal = 192 fl oz
2 gal = 256 fl oz
5/2 gal = 320 fl oz

Imperial Gallons to Ounces:

1/8 gal = 20 fl oz
1/4 gal = 40 fl oz
1/2 gal = 80 fl oz
1 gal = 160 fl oz
3/2 gal = 240 fl oz
2 gal = 320 fl oz
5/2 gal = 400 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.