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Convert Gallon (US) to Fluid Ounce (US).

Input the value of gallons (us) below to convert instantly to fluid ounces (us) with standard conversions, definitions, and equations.

Volume Converter

gal

fl oz

Value in Fluid Ounces (US) = Value in Gallons (US) × 127.999998 Multiply the value in gallons (us) by the conversion factor 127.999998.

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How to Convert Gallons (US) to Fluid Ounces (US)

To convert gallon (us) to fluid ounce (us), we use the official conversion formulas. Below is the mathematical formula, plain-English explanation, and a worked example.

gallon-to-fluid-ounce-formula.py

# Mathematical Formula

Value in Fluid Ounces (US) = Value in Gallons (US) × 127.999998

# Worked Example (5 gal)

5 gal × 127.999998 = 640.0000 fl oz

What is a Gallon (US)?

Gallon (US) (gal)

US liquid volume unit equal to 4 quarts, 8 pints, or 3.785 liters.

What is a Fluid Ounce (US)?

Fluid Ounce (US) (fl oz)

US liquid volume unit, equal to approximately 29.57 milliliters.

Gallon (US) to Fluid Ounce (US) Conversion Table

Gallon (US) (gal)	Fluid Ounce (US) (fl oz)
1 gal	128 fl oz
2 gal	256 fl oz
3 gal	383.99999 fl oz
5 gal	639.99999 fl oz
10 gal	1279.99998 fl oz
15 gal	1919.99997 fl oz
20 gal	2559.99996 fl oz
25 gal	3199.99995 fl oz
50 gal	6399.9999 fl oz
100 gal	12799.9998 fl oz
250 gal	31999.99949 fl oz
500 gal	63999.99899 fl oz
1000 gal	127999.99797 fl oz

Fluid Ounce (US) to Gallon (US) Conversion Table

Fluid Ounce (US) (fl oz)	Gallon (US) (gal)
1 fl oz	0.00781 gal
2 fl oz	0.01563 gal
3 fl oz	0.02344 gal
5 fl oz	0.03906 gal
10 fl oz	0.07813 gal
15 fl oz	0.11719 gal
20 fl oz	0.15625 gal
25 fl oz	0.19531 gal
50 fl oz	0.39063 gal
100 fl oz	0.78125 gal
250 fl oz	1.95313 gal
500 fl oz	3.90625 gal
1000 fl oz	7.8125 gal

Questions

Frequently Asked Questions

How do I convert gallons (us) to fluid ounces (us)?

Multiply the value in gallons (us) by the conversion factor 127.999998. For example, to convert 5 gallons (us) to fluid ounces (us): 5 × 127.999998 = 640.0000 fl oz.

What is the conversion factor from gallon (us) to fluid ounce (us)?

The conversion factor is 127.999998. One gallon (us) is equal to 127.999998 fluid ounces (us).

What is the reverse conversion from fluid ounce (us) to gallon (us)?

To convert fluid ounces (us) back to gallons (us), multiply by 0.007813 (or divide the value by 127.999998). One fluid ounce (us) is equal to 0.007813 gallons (us).

How many cups are in a gallon?

There are exactly 16 US cups in a standard US gallon.

How many ml is in a teaspoon?

One US teaspoon is approximately 4.93 milliliters (commonly rounded to 5ml in culinary usage).

How many quarts are in a gallon?

There are exactly 4 quarts in one gallon.

Related Volume Conversions

Gallon (US) to Milliliter Gallon (US) to Liter Gallon (US) to Cubic Meter Gallon (US) to Teaspoon (US) Gallon (US) to Tablespoon (US) Gallon (US) to Cup (US) Gallon (US) to Pint (US) Gallon (US) to Quart (US)