Fluid ounces (US) to Gallons (US Liquid) converter

US Fluid Ounces and US Gallons: Definitions

Fluid Ounce (US) is a unit of liquid volume in the United States customary system.

• 1 US fl oz = 29.5735 ml
• Standard relations: 1 cup = 8 fl oz, 1 pint = 16 fl oz, 1 quart = 32 fl oz, 1 gallon = 128 fl oz
• Usage: measuring small volumes of liquids in cooking, beverages, or lab work.

Gallon (US) is a larger unit of liquid volume in the United States.

• 1 US gallon = 3.785411784 L
• Relations: 1 gallon = 4 quarts = 8 pints = 16 cups = 128 fl oz
• Usage: large volumes like milk, juice, or fuel containers.

Conversion Between Fluid Ounces and Gallons

How to Convert:

• Fluid Ounces → Gallons: gallons = fluid ounces ÷ 128
• Gallons → Fluid Ounces: fluid ounces = gallons × 128

Examples:

• 64 fl oz → 64 ÷ 128 = 0.5 gallons
• 32 fl oz → 32 ÷ 128 = 0.25 gallons
• 1 gallon → 1 × 128 = 128 fl oz
• 0.75 gallon → 0.75 × 128 = 96 fl oz

Additional Notes

• US fluid ounces differ from UK (imperial) fluid ounces (1 UK fl oz ≈ 28.41 ml).
• For precise conversions, use milliliters or liters as intermediate units.
• Understanding all volume relations — cups, pints, quarts, gallons — helps convert recipes or measurements quickly.