The number of water bottles in a gallon will be different for the different measurement systems. The reason is that different measurement system occupies different volumes of fluid in gallons. By doing initial mathematics, it is obvious that a gallon bottle can occupy the following liter of water as in different measurement systems.

1 US gallon liquid = 3.785 liter or 231 cubic inches

1 UK or imperial gallon = 4.546 liter or 277.4 cubic inches

So how many bottles of water is a gallon? A US gallon of water has 128 fluid ounces and imperial gallon has 160 fluid ounces.  There are 7.47 water bottles of 16.9 ounces (500 ml) in a US gallon while a UK gallon or imperial gallon has 9.46 water bottles of 16.9 ounces (500ml).

Note: Liter is a basic unit of volume in metric system. One liter of water weighs one kilogram.

Relationship with different units:

The conversion of other units of volume to the US gallon are in the table given below.

Other UnitsConversion
1 ounce0.0078125 US Gallon
1 US quart0.25 US gallon or (1/4) th of US gallon
1 US tablespoon0.00390625 US gallon or (1/256) th of US gallon
1 US pint0.128 US gallon or (1/8) th of US gallon
1 Imperial quart0.300237 US gallon
1 Imperial pint0.150119 US gallon
1 Cubic Foot7.4805324 US gallon

How Many Bottles of water are in a Gallon?

The number of bottle depends upon the volume of liquid in a bottle to fill the gallon bottle completely. As there are, different kinds of gallons depending upon the system of measurements so the numbers of bottles required will be different for both cases. Below is some standard bottle required to fill the US gallon bottle?

Volume of each BottleBottle required to completely fill gallon bottle
160ml bottle23.66 bottle required
190ml bottle19.92 bottle required
250ml bottle15.14 bottle required
280ml bottle13.52 bottle required
300ml bottle12.62 bottle required
350ml bottle10.82 bottle required
400ml bottle9.4 bottle required
500ml bottle7.57 bottle required
850ml bottle4.45 bottle required
1000ml bottle3.78 bottle required

Water bottles in US gallon:

Considering the amount of water per US liter, US gallon can be justified as below.

Taking 500ml bottle as the unit. The number of bottles in a US gallon are 7.57.

Water bottles in UK gallon?

The number of bottles required for filling the UK gallon completely requires more bottles than required for US gallon. The reason is UK gallon occupies much volume than the US. When UK gallon is converted into liter, it is equal to 4.54609 liters per gallon.

So mathematics says that UK gallon will occupy 9.1 bottles taking 500ml bottle as a unit. Comparing it with bottle required for US gallon are 7.571 bottles of 500ml. As we can see, the numbers of bottles required for UK gallon are more than required for US gallon.

Imperial Gallon:

Imperial is a customary measurement system. In this system, Imperial is a unit for volume of the substance. The conversion to other units will be like

1 imperial gallon = 8 pints.

Pint is a smaller unit for measuring. Usually, it is used for measuring the volume of any dry material.

Pints:

Pint is a smaller unit used for measuring the capacity of material in the imperial measurement system and the United States measurement system. The symbol used for this pints is shortened pints i.e. pt or p.

Liquid measurements:

1 pint = 0.473 US liter

1 pint = 0.568 British liter

Dry Measurement:

1 pint = 0.551 US liter

Quarts:

Quart is a Measure of capacity in the US measuring system. It is a bigger unit than that of a pint, 1 US quart is equal to 2 pints or 0.946 liters which is used for measuring the capacity of material in the metric measurement system and United States measurement system. There are different kinds of quarts. US Fluid quart, US Dry quart, and UK quart. The symbol used for this quarts is shortened quart i.e. qt or q.

Conversions:

1 US quart (fluid) = 0.946 liters

1 US quart (dry) = 1.101 liters

1 UK quart = 1.136 liters

A UK quart is an imperial British measuring system.

Note: Liter is a basic unit of volume in metric system. One liter of water weighs one kilogram.

Ounce:

Ounce in measurement system which is used for weight. The number of ounces in a liter is 33.814 oz.

Bottles of water in a 5 gallon jug.

The number of bottles in each 5 gallon jug will be as follows:

Jug filled by 5 US gallons:

As one US gallon occupies.

1 US gallon      = 3785.4 ml

5 US gallon      = 5*3785.4

5 US gallon      = 18927 ml

Taking 500ml bottle as unit.

Bottles of water in 5 gallon jug =   (18927 ml) / (500 ml)

                                                   = 37.854

Hence, a 5 gallon jug occupies 37.854 number of bottles.

Jug filled by 5 UK gallons:

As one UK gallon occupies.

1 UK gallon      = 4546.1 ml

5 UK gallon      = 5*4546.1

5 UK gallon      = 22730.5 ml

Taking 500ml bottle as unit.

Bottles of water in 5 gallon jug =   (22730.5 ml) / (500 ml)

                                                   = 45.461

Hence, a 5 gallon jug occupies 45.461 number of bottles.

2 liter bottles are in a gallon?

US gallon:

1 liter bottle = 1000 ml

2 liter bottle = 2000 ml

1 US gallon = 3785.4 ml

2 liters bottles in a gallon =  (3785.4 ml) / (2000 ml)

Therefore, in one US gallon there will be 1.893 numbers of 2 liter bottles.

UK gallon:

1 liter bottle = 1000 ml

2 liter bottle = 2000 ml

1 UK gallon = 4646.1

2 liters bottles in a gallon =  (4546.1 ml) / (2000 ml)

Therefore, in one UK gallon there will be 2.273 numbers of 2 liter bottles.

5 liters bottles are in a gallon?

US gallon:

1 liter bottle = 1000 ml

5 liter bottle = 5000 ml

1 US gallon = 3785.4 ml

5 liters bottles in a gallon =  (3785.4 ml) / (5000 ml)

                                          = 0.757

Therefore, in one US gallon there will be 0.757 numbers of 5 liter bottles.

UK gallon:

1 liter bottle = 1000 ml

5 liter bottle = 5000 ml

1 UK gallon = 4546.1ml

5 liters bottles in a gallon =  (4546.1 ml) / (5000 ml)

                                          = 0.91

Therefore, in one UK gallon there will be 0.91 numbers of 5 liter bottles.

Bottles of wine in one gallon?

The number of the bottle depends upon the volume of wine in a bottle. To completely fill the gallon bottle, below is some standard bottle required to completely fill the one gallon bottle with wine?

Volume of each BottleBottle required to completely fill US gallon bottle
750 ml bottle5.05 bottle required
1000ml bottle3.784 bottle required
1500 ml bottle2.524 bottle required
2000 ml bottle1.893 bottle required
2500 ml bottle1.514 bottle required
3000 ml bottle1.262 bottle required
4000 ml bottle0.950 bottle required

How many Ounces are in a gallon? 

There are 128 ounces in a US gallon. There are different types of gallon i.e. US and UK gallons. Each type of gallon refers to a different system of measurements. Hence US and UK gallons have different capacities. The number of ounces in 2, 5, and 10 gallon jugs can be calculated as below.

1 US gallon = 128 ounces

1 ounce = 1/128

1 ounce = 0.00781 gallon

1 US gallon = 3785.4 ml

1 ml = 1/3785.4

1 ml = 0.0002642 US gallon (i)

1 UK gallon = 4546.1 ml

1 ml = 1/4546.1

1 ml = 0.0002200 UK gallon (ii)

By equating (i) and (ii)

0.00022 UK gallon = 0.0002642 US gallon

Therefore,

1 UK gallon = 1.201 US gallon

Hence,

1 UK gallon h = 1.201*128 ounces

1 UK gallon h = 153.73 ounces

Gallons to liter Formula for conversion

From US gallon

Liters = No. of gallons × 3.7854

From UK gallon

Liters = No. of gallons × 4.5461

Liters to gallon Formula for conversion

US gallon = (No. of liters) / 3.7854

 UK gallon = (No. of liters) / 4.5461

Liter to gallon conversion

Fluid Ounces in a Water Bottle and Gallon

There are 128 ounces in US gallon and 153.73 ounces in UK gallon. According to the Institute of Medicine (IoM), it is recommended that we should drink 11-13 cups of water a day. Which is about 2.5 to 3.5 liters of water. Converting into fluid ounces, we should be drinking 34 ounces of water each day.

Factors That Affect Accuracy of Answer

There are a number of factors that affect the accuracy of the answers. The process is dependent on the consistency of variable procedures that are adopted for the calculations and mode of decision.

For example, making a computational error in formulae and doing the wrong mathematical processes in any step will lead to the whole process wrong so our answers will be wrong. On the other hand, while making conversion of units the number of significant figures matters a lot. If the roundoff error is large, there will be a significant difference in answers.

How many 16.9 oz bottles make Gallon?

We have previously discussed in the article that 16.9 oz is equal to 500ml for water. As we know, a US gallon has a total of 128 oz. So 128/16.9 = 7.57. Therefore, a total of 7.57 water bottles of 16.9 oz make up a US gallon.

Coming to UK gallon, it’s a total of 160 oz. As 160/16.9 = 9.46. Therefore, a total of 9.46 water bottles of 16.9 oz make up a UK gallon.

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