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

Convert Gallons to Fluid Ounces

Convert from gallons to fluid ounces with this simple formula:
fluid ounces = gallons × 128
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1 Gallon = 128 Fluid Ounces

Learn How to Convert Gallons to Fluid Ounces Using our Conversion Formula

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, 5gal = (5 × 128) = 640fl 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 1gal. A fluid ounce is an imperial measurement and can be abbreviated as fl oz, for example 1fl oz.

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

More Fluid-volume Conversions

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

Gallon Measurements and Equivalent Fluid Ounce Conversions

Common gallon values converted to the equivalent fluid ounce value
Gallons Fluid Ounces Gallons Fluid Ounces Gallons Fluid Ounces
1 128 21 2,688 41 5,248
2 256 22 2,816 42 5,376
3 384 23 2,944 43 5,504
4 512 24 3,072 44 5,632
5 640 25 3,200 45 5,760
6 768 26 3,328 46 5,888
7 896 27 3,456 47 6,016
8 1,024 28 3,584 48 6,144
9 1,152 29 3,712 49 6,272
10 1,280 30 3,840 50 6,400
11 1,408 31 3,968 51 6,528
12 1,536 32 4,096 52 6,656
13 1,664 33 4,224 53 6,784
14 1,792 34 4,352 54 6,912
15 1,920 35 4,480 55 7,040
16 2,048 36 4,608 56 7,168
17 2,176 37 4,736 57 7,296
18 2,304 38 4,864 58 7,424
19 2,432 39 4,992 59 7,552
20 2,560 40 5,120 60 7,680