How to convert gallons to fluid ounces?

The formula to convert gallons to fluid ounces is:

1 gallon = 128 fluid ounces

To convert gallons to fluid ounces, you can multiply the number of gallons by 128.

Here are 3 examples:

• 1 gallon = 1 × 128 = 128 fluid ounces
• 5 gallons = 5 × 128 = 640 fluid ounces
• 10 gallons = 10 × 128 = 1,280 fluid ounces

Fluid Ounce (fl oz)

A fluid ounce (fl oz) is a unit of volume in the US customary system, equivalent to 1/8 of a cup or 1/16 of a pint. The term "fluid ounce" dates back centuries, originally tied to the volume of a certain weight of water. There are two main types: the US fluid ounce and the UK (imperial) fluid ounce, which differ slightly in size.

• 1 US fl oz = 29.5735 millilitres (mL)
• 1 US fl oz = 0.0078125 gallons (gal)
• 1 US fl oz = 0.03125 quarts (qt)
• 1 US fl oz = 0.0625 pints (pt)
• 1 US fl oz = 0.125 cups
• 1 US fl oz = 2 tablespoons (tbsp)
• 1 US fl oz = 6 teaspoons (tsp)

Gallon (Gal)

A gallon (gal) is a larger unit of volume in the US customary and imperial systems of measurement. There are two primary types: the US gallon and the imperial (UK) gallon. The US gallon equals exactly 231 cubic inches or 128 US fluid ounces, while the imperial gallon is larger at about 4.54609 liters (equivalent to 160 imperial fluid ounces) and is used in the United Kingdom and some other countries.

• 1 US gallon = 128 US fluid ounces (fl oz)
• 1 US gallon = 3.78541 liters
• 1 US gallon = 4 quarts (qt)
• 1 US gallon = 8 pints (pt)
• 1 US gallon = 16 cups

Fluid Ounce to Gallon Conversion Table

__

Related: Liters to Gallons
Fluid Ounces to Milliliters