Convert Gallons to Fluid Ounces

Enter your gallon value in the form below to get the value calculated in fluid ounces.

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1 gal = 128 fl oz

How to Convert Gallons to Fluid Ounces Using an Easy Conversion Formula

Calculators can be used to convert measurements from one unit to another

Convert gallons to fluid ounces with this simple formula:

fluid ounces = gallons × 128

Converting a gallon fluid-volume measurement to a fluid ounce measurement involves multiplying your fluid-volume by the conversion ratio to find the result. A gallon is equal to 128 fluid ounces, so to convert simply multiply by 128.

For example:
5 gal = (5 × 128) = 640 fl oz

Gallons and fluid ounces are both units used to measure fluid volume. Learn more about fluid volume and find more fluid volume measurement conversion calculators. A gallon is an imperial measurement and can be abbreviated as gal, for example 1 gal. A fluid ounce is an imperial measurement and can be abbreviated as fl oz, for example 1 fl oz.

gallons and fluid ounces are units used to measure fluid volume
Convert Fluid Ounces to Gallons

Gallon Measurements and Equivalent Fluid Ounce Conversions

Common gallon values converted to the equivalent fluid ounce value
Gallons Fluid Ounces
1 gal 128 fl oz
2 gal 256 fl oz
3 gal 384 fl oz
4 gal 512 fl oz
5 gal 640 fl oz
6 gal 768 fl oz
7 gal 896 fl oz
8 gal 1,024 fl oz
9 gal 1,152 fl oz
10 gal 1,280 fl oz
11 gal 1,408 fl oz
12 gal 1,536 fl oz
13 gal 1,664 fl oz
14 gal 1,792 fl oz
15 gal 1,920 fl oz
16 gal 2,048 fl oz
17 gal 2,176 fl oz
18 gal 2,304 fl oz
19 gal 2,432 fl oz
20 gal 2,560 fl oz
21 gal 2,688 fl oz
22 gal 2,816 fl oz
23 gal 2,944 fl oz
24 gal 3,072 fl oz
25 gal 3,200 fl oz
26 gal 3,328 fl oz
27 gal 3,456 fl oz
28 gal 3,584 fl oz
29 gal 3,712 fl oz
30 gal 3,840 fl oz
31 gal 3,968 fl oz
32 gal 4,096 fl oz
33 gal 4,224 fl oz
34 gal 4,352 fl oz
35 gal 4,480 fl oz
36 gal 4,608 fl oz
37 gal 4,736 fl oz
38 gal 4,864 fl oz
39 gal 4,992 fl oz
40 gal 5,120 fl oz

More Fluid-volume Conversions

Convert to Quarts Fluid Volume
1 gal is equal to 4 quarts
Convert to Pints Fluid Volume
1 gal is equal to 8 pints
Convert to Cups Fluid Volume
1 gal is equal to 16 cups
Convert to Tablespoons Fluid Volume
1 gal is equal to 256 tablespoons
Convert to Teaspoons Fluid Volume
1 gal is equal to 768 teaspoons
Convert to Liters Fluid Volume
1 gal is equal to 3.785412 liters
Convert to Milliliters Fluid Volume
1 gal is equal to 3,785 milliliters
Convert to Cubic Inches Fluid Volume
1 gal is equal to 230.999493 cubic inches
Convert to Cubic Feet Fluid Volume
1 gal is equal to 0.133681 cubic feet
Convert to Cubic Yards Fluid Volume
1 gal is equal to 0.004951 cubic yards
Convert to Cubic Centimeters Fluid Volume
1 gal is equal to 3,785 cubic centimeters
Convert to Cubic Meters Fluid Volume
1 gal is equal to 0.003785 cubic meters