# Do you know how many water bottles equal a gallon

### The imperial system of measurement:

While the whole world uses the metric system as a standard of measurement, in the USA, they use the imperial system as a standard of measurement.

In the imperial system, to measure the quantity of water is measured in a pound, ounces, gallons, pint, fluid ounce, etc.

To convert fluid ounces in the liter. You have to multiply a liter with 33.81402. according to a doctor, a human on average should consume about 3.7 liters of water a day for a man and 2.7 liters per day for a woman.

Many people wonder how many bottles of water they have to drink to meet the daily need or how much water a water bottle contains.

Here’s how to measure how many water bottles equal a gallon.

In the United States, on average a water bottle can contain and are available in variants like 8 ounces, 12 ounces, 16.9 ounces, 24 ounces, 28 ounces, and 33.8 ounces which is a 1-liter water bottle.

In the United States, 128 fluid ounces is equal to 1 US gallon. Now, if you want to find out how many water bottles equal a gallon, just divide 128 by the size of water bottle you have in fluid ounces.

Example: If you have a 12-ounce water bottle, divide 128 by the number of ounces which here are 12. You get 12.67, which is exactly the number of bottles you would need to fill 1 gallon.

Accordingly, you could calculate the number of water bottles it takes to fill a gallon, count it similarly.

### Mathematical Formula:

Here’s the mathematical formula to count how many water bottles equal a gallon:

Number of Water Bottles = (Number of gallons * 128) / Size of Water Bottle in Fluid Ounces

There you go. Now you know how many bottles it takes to fill a gallon of water in various standard US bottles and you can even calculate on your own now.