Some of the commonly found units of measurement for liquids are ounces, liters, pints, quarts, and gallons. Although it may seem confusing, I have a simple chart for you. And, we will discuss in detail gallons to ounces and other liquid measures in this post.

How do both systems work?

The usual liquid measuring systems in the U.S. and the U.K. take liquids by volume and divide them into four parts. However, the most significant difference in the calculation. While the U.S. measuring system says a gallon is 128 ounces, the U.K. system defines a gallon as 160 ounces. Now, there's a big difference here. Although both systems use gallons, ounces, pints, and quarts, they use different volume measurements. To summarize this, the U.K. gallon is approximately 20% larger than the U.S. gallon.

A gallon is a volume measure for liquid in the standard U.S. measuring system. The abbreviation for a gallon is "gal.

What is an ounce of liquid?

A fluid ounce is another measure of volume for liquid or dry mass in the U.S. Customary Measurement System. The symbol is "fl oz.

How many fluid ounces in a cup? Learn how to calculate with easy-to-use kitchen conversion calculators

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The standard U.S. framework considers a gallon as the imperial unit of liquid volume. While liters and milliliters are expected in the U.K. and Europe, here in the U.S., the measurement is in gallons. In the usual U.S. context, gallons can be liquid or dry and are distinguished by their size and imperial structure. When used in liquid, the abbreviation for gallon is always "gal."

The liquid ounce (as discussed in our previous post) is a unit of imperial and usual U.S. volume, which applies to both dry and liquid or fluid. For example, one cup equals eight liquid ounces while one cup equals the dry mass of the non-liquid item in the cup. In summary, liquid ounces are units of volume and should never be confused with dry ounces, which means mass or weight.

One gallon of fluid U.S. = 128 fluid ounces U.S.

The formula is reversed here. To convert fluid ounces to gallons, divide the gallon value by 128.

1 U.S. fluid ounce = 0.0078125 fluid gallon

How many ounces of imperial fluid in an imperial garden?

According to the imperial system, there are 160 ounces of imperial fluid in an imperial gallon. If you want to convert the imperial gallons into fluid ounces, multiply the imperial gallons' value by 160.