How do you convert us gallons to us fluid ounces?

To convert us gallons to us fluid ounces, multiply by 128. For example, 3 gal is 384 fl oz.

How many us fluid ounces are in a us gallon?

There are 128 us fluid ounces in one us gallon.

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Converters · Volume

3 US gallons to US fluid ounces

3 gal =

384 fl oz

3 us gallons equals 384 us fluid ounces

How to convert us gallons to us fluid ounces

To get us fluid ounces, multiply by 128.

fl oz = gal × 128

Worked example: 3 × 128 = 384 fl oz.

Going the other way, multiply by 0.0078125 — one us fluid ounce is 0.0078125 us gallons.

Values near 3 gal

US gallon	US fluid ounce
1 gal	128 fl oz
1.5 gal	192 fl oz
2 gal	256 fl oz
4 gal	512 fl oz
5 gal	640 fl oz
6 gal	768 fl oz

US gallon to US fluid ounce — common values

US gallon	US fluid ounce
1 gal	128 fl oz
2 gal	256 fl oz
3 gal	384 fl oz
5 gal	640 fl oz
10 gal	1280 fl oz
25 gal	3200 fl oz
50 gal	6400 fl oz
100 gal	12800 fl oz

Convert US gallon to other units

gal → L gal → mL gal → m³ gal → qt gal → pt gal → cup gal → fl oz gal → tbsp gal → tsp

← Reverse: US fluid ounce to US gallon

Questions

How do you convert us gallons to us fluid ounces?: To convert us gallons to us fluid ounces, multiply by 128. For example, 3 gal is 384 fl oz.
How many us fluid ounces are in a us gallon?: There are 128 us fluid ounces in one us gallon.
How do you convert us fluid ounces back to us gallons?: Go the other way: multiply by 0.0078125. One us fluid ounce is 0.0078125 us gallons.

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