How Many Fluid Ounces in a Gallon?

There are 128 fluid ounces in a gallon. One gallon equals 4 quarts, 8 pints, or 16 cups.

Quick and accurate fluid ounces to gallons conversion calculator

Ounces to Gallons Converter

Result: - gallons

Common Ounces to Gallons Conversions

  • 32 fl oz = 0.25 gallons (1 quart)
  • 64 fl oz = 0.5 gallons (half gallon)
  • 128 fl oz = 1 gallon
  • 256 fl oz = 2 gallons
  • 384 fl oz = 3 gallons

Common Liquid Measurements

  • Water jug: 1 gallon (128 fl oz)
  • Large soda bottle: 2 liters (67.6 fl oz)
  • Water bottle: 16.9 fl oz (500 ml)
  • Coffee cup: 8 fl oz (1 cup)

Simple Conversion Formula

Converting between fluid ounces and gallons is straightforward since there are 128 fluid ounces in 1 gallon. To convert:

  • Fluid Ounces to Gallons: Divide the number of ounces by 128
  • Gallons to Fluid Ounces: Multiply the number of gallons by 128

Formula: Gallons = Fluid Ounces ÷ 128

Example: 256 fl oz = 256 ÷ 128 = 2 gallons

Quick Facts

  • 1 gallon = 128 fluid ounces
  • 1 gallon = 4 quarts
  • 1 gallon = 8 pints
  • 1 gallon = 16 cups

Metric Equivalents

  • 1 gallon = 3.785 liters
  • 1 fluid ounce = 29.574 milliliters
  • 1 liter = 33.814 fluid ounces
  • 2 liters = 67.628 fluid ounces

Professional Applications

  • Bulk Storage: Used in industrial liquid storage
  • Shipping: Critical for transport calculations
  • Manufacturing: Used in production planning
  • Chemical Processing: Important for mixing ratios

Frequently Asked Questions

How many fluid ounces in a gallon?
128 fluid ounces equals 1 gallon. This is the standard US liquid gallon measurement.
How many gallons is 64 fluid ounces?
64 fluid ounces equals 0.5 gallons. This is half a gallon, commonly used in large beverage containers.
How many gallons is 32 fluid ounces?
32 fluid ounces equals 0.25 gallons. This is a quarter gallon, or one quart.
How many gallons is 256 fluid ounces?
256 fluid ounces equals 2 gallons. This is commonly used for large batch cooking.
How many gallons is 16 fluid ounces?
16 fluid ounces equals 0.125 gallons. This is one-eighth of a gallon, or one pint.