**How Many Ounces In A Gallon:** No longer wonder how many ounces are in a gallon. Here is a helpful chart that shows you how to change fluid ounces into gallons or gallons into ounces. Enjoy a FREE conversion chart as well!

Would you agree that reading the recipes makes you feel queasy because of all the many measurement units used, such as the imperial pint, US liquid quart, dry gallon, liquid cup, weight ounce, etc.

I am aware that the variety of measurements can occasionally be rather perplexing.

No conversion is ever simple. But attempting to translate between two different measurement systems is particularly challenging.

For instance, Canada and other nations that use the metric measurement system contrast the imperial system of the United States with the metric system.

The amount of water your should consume each day is one of the most often asked questions & what is the price per gallon

The U.S. National Academies of Sciences, Engineering & Medicine advise healthy adults to drink enough water each day according to the Mayo Clinic website:

for men: 15.5 cups or 3.7 liters and

for women: 11.5 cups or 2.7 liters.

Men should drink around 1 gallon of water per day while women should drink about 0.7 gallons. where 1 US gallon equals 16 eight ounce glasses of water.

But because it must take other aspects into account, fluid intake is more difficult. They are generally speaking activity, the weather, and general health.

I have done conversions for you from ounces to cups, quarts, and pints despite what could seem to be difficulties with all the conversions of water and other liquids.

**how many ounces in a liter**

There are approximately 33.814 ounces in one liter. This is based on the US customary fluid ounce and the metric system liter. The exact conversion factor is 1 liter = 33.8140226 US fluid ounces.

**how many ounces in a gallon of water**

There are 128 fluid ounces in a US gallon of water. This is based on the US customary fluid ounce and gallon measurements. In the UK a gallon is defined as 160 fluid ounces so there would be 160 fluid ounces in a UK gallon of water.

**how many ounces in a gallon of milk**

A gallon of milk has the same number of total ounces as a gallon of water which is 128. This is based on the US values of fluid ounces and gallons. So, 128 fluid ounces make up a US gallon of milk. Because milk and water have different densities, the weight of a gallon of milk & a gallon of water can vary a little bit.

**how many ounces in a gallon of ice cream**

Depending on how dense the ice cream is the number of fluid ounces in a gallon of ice cream can change. But if the ice cream has the same mass as whole milk, a gallon of ice cream would have about 128 fluid ounces. Ice cream is usually sold by weight not by volume so the weight of a gallon of ice cream would the more correct measurement.

**how many ounces in a gallon and a half**

A gallon & a half is equal to 1.5 gallons. To convert 1.5 gallons to fluid ounces you can simply multiply by the conversion factor of 128 fluid ounces per gallon:

1.5 gallons x 128 fluid ounces per gallon = 192 fluid ounces

Therefore there are 192 fluid ounces in a gallon and a half.

**how many ounces in a gallon of paint**

The number of fluid ounces in a gallon of paint depends on the density of the paint. However a gallon of paint is typically sold by weight rather than volume.

A gallon of paint is equal to 128 fluid ounces by volume, based on the US customary fluid ounce and gallon measurements. But since the weight of paint can vary depending on the type and brand it is important to check the weight of the paint rather than relying on volume measurements.

The weight of the paint is usually listed on the paint can or container, and it is measured in pounds or kilograms.

**how many ounces in a gallon of liquid**

A gallon of liquid can refer to different types of fluids, each with different densities and weights. However, a US gallon of liquid contains 128 US fluid ounces, based on the US customary fluid ounce and gallon measurements. In the UK, a gallon of liquid contains 160 UK fluid ounces.

It’s important to note that the weight of a gallon of liquid can vary depending on its density with denser liquids weighing more than less dense ones. Therefore it’s important to consider the weight or specific gravity of the liquid especially if your need to measure or handle it by weight instead of volume.

**What is a gallon?**

A gallon is a unit of measurement for volume commonly used in the United States & other countries. In the US customary system, one gallon is equal to 128 fluid ounces or 3.785 liters.

The imperial gallon, which is used in the United Kingdom, Canada & other Commonwealth countries is slightly larger, with one imperial gallon equal to 160 fluid ounces or 4.546 liters. Gallons are used to measure the volume of liquids, such as gasoline, milk & water.

**US gallon vs. Imperial gallon**

The US gallon and the imperial gallon are two different units of measurement for volume with slightly different values.

In the US customary system one gallon is equal to 128 fluid ounces or approximately 3.785 liters.

In the imperial system one gallon is equal to 160 fluid ounces or approximately 4.546 liters.

So, the imperial gallon is larger than the US gallon by about 20% . This means that when converting between US gallons and imperial gallons it’s important to take this difference into account.

It’s also worth noting that the US customary system is primarily used in the U S, while the imperial system is used in the United Kingdom, Canada & other Commonwealth countries.

**What is a fluid ounce?**

A unit of weight measured in dry ounces {oz} or a unit of volume measured in fluid ounces are both referred to as ounces. (fl. oz. or fl oz).

**US ounce vs. Imperial ounce**

In the Imperial measurement system, the US fluid ounce is bigger than the UK fluid ounce:

1 US liquid oz = 29.5735 mL

1 UK liquid oz = 28.4131 mL

**How many fluid ounces in a gallon**

Let’s look a t how many fluid ounces are in a gallon.

1 gallon to ounces (1 gal to fl. oz.)

128 US fluid ounces make up one US gallon of liquid, or

1 gal is 128 fl oz.

**One Imperial gallon is equal to 160 UK fluid ounces, or**

1 gal equals 160 fl oz.

**Gallon to ounce equals one to one. (1 fl. oz. to gal)**

**Which ounce measures an ounce: US or British imperial?**

0.0078125 US gallon is equivalent to 1 US fluid ounce.

0.00625 Imperial gallons make up one Imperial fluid ounce.

**How to convert gallons to ounces**

Multiply the number of US gallons by 128 to convert to US fluid ounces where 128 is a conversion factor:

the gal x 160.

An example follows.

**How many ounces in 2 gallons?**

(US system) 2 gal x 128 = 256 fl oz.

2 US gallons equal 256 US fluid ounces.

320 fl oz (Imperial system) from 2 gal x 160.

2 Imperial gallons contain 320 Imperial fluid ounces.

Let’s do some more math The conversions listed below are all done in US fluid measurements.

**How many ounces in a half gallon**

A half gallon has 64 fluid ounces in it.

**How many ounces in 3 gallons**

Three gallons contain 384 fluid ounces.

**How many ounces in 4 gallons**

4 gallons contain 512 fluid ounces.

**How many ounces in 5 gallons**

5 gallons contain 640 fluid ounces.

**Gallons to fl oz conversion chart**

A simple conversion chart from US gallons to US fluid ounces is shown below.

Gallons |
Fluid ounces |
Gallons |
Fluid ounces |

1 gal | 128 fl oz | 13 gal | 1664 fl oz |

2 gal | 256 fl oz | 14 gal | 1792 fl oz |

3 gal | 384 fl oz | 15 gal | 1920 fl oz |

4 gal | 512 fl oz | 16 gal | 2048 fl oz |

5 gal | 640 fl oz | 17 gal | 2176 fl oz |

6 gal | 768 fl oz | 18 gal | 2304 fl oz |

7 gal | 896 fl oz | 19 gal | 2432 fl oz |

8 gal | 1024 fl oz | 20 gal | 2560 fl oz |

9 gal | 1152 fl oz | 21 gal | 3840 fl oz |

10 gal | 1280 fl oz | 22 gal | 5120 fl oz |

11 gal | 1408 fl oz | 23 gal | 6400 fl oz |

12 gal | 1536 fl oz | 24 gal | 12800 fl oz |

**US gallon conversion table**

Here is a further conversion table for imperial fluid ounces to imperial gallons.

Gallons |
Fluid ounces |
Gallons |
Fluid ounces |

1 gal | 160 fl oz | 11 gal | 1760 fl oz |

2 gal | 320 fl oz | 12 gal | 1920 fl oz |

3 gal | 480 fl oz | 13 gal | 2080 fl oz |

4 gal | 640 fl oz | 14 gal | 2240 fl oz |

5 gal | 800 fl oz | 15 gal | 2400 fl oz |

6 gal | 960 fl oz | 16 gal | 2560 fl oz |

7 gal | 1120 fl oz | 17 gal | 2720 fl oz |

8 gal | 1280 fl oz | 18 gal | 2880 fl oz |

9 gal | 1440 fl oz | 19 gal | 3040 fl oz |

10 gal | 1600 fl oz | 20 gal | 3200 fl oz |

Imperial gallon conversion table

**Fraction of gallon to ounces conversion chart**

This table gives a clear explanation of how to change a portion of US gallons into US fluid ounces.

A gallon weighs 128 ounces in the US system, while a half gallon weighs 64 ounces. There are 80 Imperial fluid ounces in a half gallon & 160 Imperial fluid ounces in a gallon according to the Imperial system.

But how many ounces in ¾. ⅔ . ⅓ . ¼ & ⅛ gallon?

Fraction of gallon |
Fluid ounces |

1 gal | 128 fl oz |

¾ gal | 96 fl oz |

⅔ gal | 84 fl oz |

½ gal | 64 fl oz |

⅓ gal | 42 fl oz |

¼ gal | 32 fl oz |

⅛ gal | 16 fl oz |

Converter for fractions of a gallon to ounces

**How to convert ounces to gallons**

**Divide the number of ounces by 128 to convert US fluid ounces to US gallons where 128 is a conversion factor:**

the oz ÷ 128.

**Calculating 1 ounce to a gallon, for instance:**

1 oz ÷ 128 = 0.0078125 gal

**Divide the quantity of fluid ounces by 160, where 160 is a conversion factor, to convert Imperial fluid ounces to Imperial gallons:**

the oz ÷ 160.

**Calculating 1 ounce to a gallon, for instance:**

1 oz ÷ 160 = 0.00625 gal

**Ounce to gallon conversion chart**

Here is a quick reference chart that converts US fluid ounces to US gallons (fl oz to gal) for liquid measurements.

Fluid ounces |
Gallons |
Fluid ounces |
Gallons |

1 fl oz | 0.007812 gal | 20 fl oz | 0.15625 gal |

2 fl oz | 0.015625 gal | 30 fl oz | 0.234375 gal |

3 fl oz | 0.023437 gal | 40 fl oz | 0.3125 gal |

4 fl oz | 0.03125 gal | 50 fl oz | 0.390625 gal |

5 fl oz | 0.039062 gal | 60 fl oz | 0.46875 gal |

6 fl oz | 0.046875 gal | 70 fl oz | 0.546875 gal |

7 fl oz | 0.054687 gal | 80 fl oz | 0.625 gal |

8 fl oz | 0.0625 gal | 90 fl oz | 0.703125 gal |

9 fl oz | 0.070312 gal | 100 fl oz | 0.78125 gal |

10 fl oz | 0.078125 gal | 1000 fl oz | 7.8125 gal |

Table converting fluid ounces to gal

**Other gallon volume conversions**

Here is a simple conversion table showing additional US volume units, unless otherwise stated, and one gallon (1 gal).

Units |
Number of units |

Quarts | 4 qt. |

Pints | 8 pt. |

Cups (US) | 16 cups US |

Cups (Imperial) | 13.33 cups U. K. |

Tablespoons | 256 tbsp |

Teaspoons | 768 tsp |

Liters | 3.79 L |

Milliliters | 3785.41 mL |

**How many ounces in a gallon of milk**

A gallon of milk sold in American supermarkets has 128 US fluid ounces. A gallon of milk contains 160 UK fluid ounces in the UK.

**How many ounces in a gallon of ice cream**

Getting preparing for a BBQ or potluck gathering? You’ll need to purchase a sizable quantity of ice cream, such as a gallon, which makes roughly 32 scoops. 4 ounces are the serving size from one scoop.

How many ounces of ice cream are there in a gallon? Unexpectedly, some containers are labeled as a gallon while, in reality, a gallon of ice cream contains 128 ounces.

**Free printable conversion chart**