Credit: Pete Markham CC-BY-SA 2.0
Q:

# How many ounces of water make a gallon?

A:

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.

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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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## Related Questions

• A:

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:
• A:

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.

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• A:

There are 128 fluid ounces in a U.S. gallon. In the United States, the gallon is a standard liquid measurement.