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How many fluid ounces are there in one gallon?

  1. 64 fluid oz

  2. 96 fluid oz

  3. 128 fluid oz

  4. 160 fluid oz

The correct answer is: 128 fluid oz

A gallon is a standard unit of measurement in the US customary system, and it is equal to 128 fluid ounces. This figure is derived from the fact that one gallon is divided into four quarts, and each quart is further divided into 32 fluid ounces. Therefore, when you multiply 4 quarts by 32 fluid ounces per quart, you arrive at 128 fluid ounces in a gallon. This conversion is essential in various practical contexts, such as cooking or measuring liquids, making it an important piece of knowledge for anyone working with measurements.