Have you ever wondered or needed to know how many water bottles equal a gallon? There are different sizes of water bottle, so the answer might vary. Read more about it below.

Before getting into the discourse of how many water bottles equal a gallon, let’s talk about the unit of measurement first. Gallon unit is used both in the British Imperial system and US customary units of measurement, which measures mostly fluid but also sometimes gas.

The Imperial measure was adopted by the British in 1824, where 1 fluid gallon is equivalent to 10 lbs. or 277.42 cu-in of water. Later, the system is adopted by the USA, but here, 1 fluid gallon is equivalent to 231 cu-in of water instead.

As mentioned above, there are variety of sizes and designs of bottles. Some of the most common sizes available are:

  • Mini bottles: 8 to 12 oz
  • Standard bottles: 16.9 oz
  • Sport water bottles: 20 oz
  • Large water bottles: 50.7 oz

For the sake of simplicity, let’s use the standard bottle size to convert. 1 gallon is equivalent to 128 oz, so simply divide 128 by 16.9 oz. A rounded-up answer is 8 water bottles and that’s roughly how many 16.9 bottles of water equal a gallon.

Another widely-used volume measurement in cooking, especially in the US, is cup. The cup is typically associated with serving sizes in cooking. It is a smaller unit of liquid measurement. For examples, people use cup unit to measure the amount of water in a glass or milk in cereal. Traditionally in the US customary units, 1 cup is equivalent to 8 oz or ½ a liquid pint, which in the metric system is roughly equal to 200 to 250 ml. Note that this may vary according to location.

By now, you have discovered the number of bottles that will fit a gallon of water. This information can be helpful if you’re trying to make sure to drink enough water in a day. Being hydrated is one of the most important things for human to survive and it is definitely will be beneficial for you to drink more water.

In general, according to some studies, it is recommended to drink at least eight times of an 8 oz glasses of water in daily basis—as some called it the 8×8 rule of thumb. For information, if you use the guide on how many water bottles equal a gallon above, this amount is equal to half a gallon or four standard-sized bottles.


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