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### Quick Answer

**There are 128 fluid ounces in one gallon of water in the system of measurement used by the United States.** By definition, a fluid ounce is 1/16 of a pint, and there are eight pints in a gallon.

The term "ounce" has several different meanings. Fluid ounces measure volume, while the term "ounce" sometimes indicates weight. A gallon of water at 70 degrees Fahrenheit weighs 8.33 pounds or 133.28 ounces. However, the density of water changes due to temperature. Water heated to the boiling point weighs exactly 8 pounds or 128 ounces. Customarily, fluid ounces apply to liquids, while weights in ounces apply to dry materials.

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Q:
## How many ounces are in a liter of water?

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Full Answer >**There are 33.814 fluid ounces in one liter of water.**A fluid ounce is an imperial measurement, whereas a liter is a metric measurement of liquids. A liter of water weighs one kilogram.Filed Under: -
Q:
## How many cups of water equal a gallon?

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Full Answer >**One gallon of water is equal to 16 cups.**One gallon is also equal to 8 pints or 4 quarts. One cup of liquid is equal to 2 pints.Filed Under: -
Q:
## One gallon equals how many ounces?

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Full Answer >**There are 128 fluid ounces in a U.S. gallon.**In the United States, the gallon is a standard liquid measurement.Filed Under: -
Q:
## How many ounces of water are in 1 liter?

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Full Answer >**There are 33.82 ounces of water in 1 liter.**One fluid ounce is 29.57 milliliters. In this particular case, the number of fluid ounces equals the number of avoirdupois ounces.Filed Under: