Learn How Many Ounces in a Gallon, 1/2 gallon and more with this helpful and quick ounces per gallon guide.
You’ll find the mathematical equation for changing gallons to ounces, and find a printable quick reference guide as well.


This article will share a printable guide on how many oz in a gallon, a printable PDF, and a guide on how to properly measure.
And we will share all the most important oz in gallon information here at the top, so you don’t have to search through an entire article!
This article will share how many oz in a gallon, 1/2 gallon, and more…
How Many Ounces in a Gallon
We will discuss the math and how to measure below… but we wanted to quickly convert 1 gallon to ounces here at the top so you don’t have to search when in a rush.
Quick OZ to Gallon Conversions:
- 64 ounces = 1/2 gallon
- 128 ounces = 1 gallon
- 256 ounces = 2 gallons
- 384 ounces = 3 gallons
- 512 ounces = 4 gallons


How to Convert Fluid Ounces in a Gallon
The proper way to use liquid or wet measuring cups is to set a clear liquid measuring cup flat on the counter.
Then pour in ingredients until you believe you have the correct amount.
Finally crouch down to eye level to ensure the measurement is accurate.
Use wet or liquid measuring cups to measure water, milk, buttermilk, broths and such.
Converting Dry OZ in a Gallon
You likely will not need to convert dry ounces in a gallon… but just in case we wanted to supply you with how to properly measure.
The proper way to use a dry measuring cup is to overfill the measuring cup.
Then use a butter knife to scrape off the top to have a perfect level measure.
Use these dry measuring cups with flour, sugar, beans, rice, and such.
OZ per Gallon Conversion Formula
The mathematical formula for finding how many fluid ounces are in a gallon: x ounces / 128 = y gallons
For every 128 ounces, you get one gallon… The guide below will give you more guide on how many fl oz in a gallon.
Use this mathematical equation anytime you need to convert oz and gallons.
Quick answer to how many oz in a gallon of water? There are 128 ounces in 1 gallon of water.
How Many Fluid Ounces in a Gallon Printable Guide
This printable oz to gallon guide is also sharable!
Share to Pinterest so you have it handy anytime you need to convert oz to gallons.


Easy Ounce to Gallon Converter (FREE PDF)
Ingredients
- 32 fl ounces = 0.25 gallon
- 64 fl ounces = 0.5 gallon
- 96 fl ounces = 0.75 gallon
- 128 fl ounces = 1 gallon
- 160 fl ounces = 1.25 gallons
- 192 fl ounces = 1.5 gallons
- 224 fl ounces = 1.75 gallons
- 256 fl ounces = 2 gallons
- 288 fl ounces = 2.25 gallons
- 320 fl ounces = 2.25 gallons
Instructions
How to Measure Dry Ingredients:
- Overfill the measuring cup.
- Use a butter knife to scrape off the top to have a perfect level measure.
How to Measure Wet Ingredients:
- Set a clear liquid measuring cup flat on the counter.
- Pour in ingredients until you believe you have the correct amount.
- Crouch down to eye level to ensure the measurement is accurate.
Nutrition
FAQ – OZ to Gallon Q&A
128 fl ounces = 1 gallon
Find more information in this Easy Ounce to Gallon Converter (FREE PDF)
8 bottles of 16 oz make one gallon
2 (16-OZ) Water Bottles = 1/4 Gallon
4 (16-OZ) Water Bottles = 1/2 Gallon
6 (16-OZ) Water Bottles = 3/4 Gallon
8 (16-OZ) Water Bottles = 1 Gallon
More information in the article… plus a free printout.
If you’re looking to drink a gallon of water a day (ideal for weight loss) you will want to drink 8 (16-OZ) bottles of water each day. If you’re just trying to hydrate well, 4 bottles (=1/2 gallon) or 6 bottles (=3/4 gallon) of water will work sufficiently.
4 (16-OZ) Water Bottles = 1/2 Gallon of water
Ideally, you should drink 4 to 8 (16-OZ) water bottles per day. Find out more in this article with a free print out, amazing water bottles, and yummy water drinks to help you enjoy your water more.
128 fl ounces = 1 gallon
32 fl ounces = 0.25 gallon
64 fl ounces = 0.5 gallon
96 fl ounces = 0.75 gallon
128 fl ounces = 1 gallon
160 fl ounces = 1.25 gallons
192 fl ounces = 1.5 gallons
224 fl ounces = 1.75 gallons
256 fl ounces = 2 gallons
288 fl ounces = 2.25 gallons
320 fl ounces = 2.25 gallons
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