How do you convert us gallons to us fluid ounces?

To convert us gallons to us fluid ounces, multiply by 128. For example, 0.5 gal is 64 fl oz.

How many us fluid ounces are in a us gallon?

There are 128 us fluid ounces in one us gallon.

dietsoda tools

All tools Sign in

Converters · Volume

0.5 US gallons to US fluid ounces

0.5 gal =

64 fl oz

0.5 us gallons equals 64 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: 0.5 × 128 = 64 fl oz.

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

Values near 0.5 gal

US gallon	US fluid ounce
0.4 gal	51.2 fl oz
0.45 gal	57.6 fl oz
0.55 gal	70.4 fl oz
0.6 gal	76.8 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, 0.5 gal is 64 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.

Embed this volume converter

Paste this into your site — an interactive converter, free.

<iframe src="https://tools.dietsoda.dev/embed/volume" width="100%" height="180" style="border:1px solid #e2e8f0;border-radius:12px" title="Volume converter"></iframe>