# How many ounces in a gallon

Are you wondering** how many ounces in a gallon**? Do you need to make a gallon to ounces conversion? You are in the right place! First of all, you will find here the answer to the question of the title, that is **how many ounces are in a gallon**. Besides this, we have for you also a formula for a gallon to ounces conversion and practical examples. Keep reading and see the topic of **how many ounces to a gallon **can be explained simply!

We will start with some theoretical information, that is with a little bit of theory about a gallon and an ounce. Why? Because it is better to know what exactly you need to convert. And maybe will you learn something new about these two units? So let’s start our theoretical part.

**What is a gallon?** A gallon is a unit of volume. It is used in two systems of measurements – that is in US customary units and British systems of measurements. It is needed to emphasize that there is more than one kind of gallon. To be more precise, there are three different kinds of gallon:

- the imperial gallon,
- the US gallon,
- the US dry gallon.

In this article we want to focus only on the US gallon. In abbreviation it is called “US gal”. The US gallon is equal to 231 cubic inches. The US gallon is also defined as exactly 3.785411784 liters.

**What is an ounce then?** The ounce can also be a unit of mass, weight and volume. In this article we are going to focus on an ounce as a unit of volume only. It is called fluid ounce. The fluid ounce exists in two versions:

- the Imperial fluid ounce,
- the US fluid ounce.

We want to focus only on the US fluid ounce. The fluid ounce is used mostly, like a gallon, to measure liquids. This unit is also used in the same two systems of measurements – US customary units and Imperial systems of measurements.

The US fluid ounce is defined as 1/16 of a US fluid pint. It is also equal to 1/128 of a US liquid gallon. This unit is also approximately defined as 29.57 ml. The symbol of a fluid ounce is fl. oz. or fl oz.

The theoretical part is already behind us. We showed you only the most important information about these two units which can be really useful in everyday life. So now it’s time to move on to the more practical parts and know the answer to the question from the title, that is **how many ounces in a gallon**.

## How many ounces in a half gallon

Before we tell you how many ounces in a gallon, we want to explain to you **how many ounces in half gallon**. Why do we want to start with it? Why do we start in just an usual way? The question **how many ounces in a half gallon** is one of the most commonly asked questions in the topic gallon to ounces conversion. Knowing **how many ounces in half gallon **can be useful in making a gallon to ounces conversions, for instance, when the volume of some product will be given in not a round number.

**So how many ounces in a half gallon? **In a half gallon is 64 US fluid ounces. So we can say a half gallon is equal to 64 ounces. The half gallon to ounces ratio you can see down below:

- ½ gallon = 64 fluid ounces.

So if you know **how many ounces in a half gallon**, we can give you an answer to the main question of this article, that is to the question **how many ounces in a gallon**.

### How many fluid ounces in a gallon

As we mentioned before when we answered the question** how many ounces are in a half gallon**, a half gallon is equal to 64 fluid ounces. **So how many fluid ounces in a gallon**? We can use a given before ratio to calculate it. It is needed to just multiply the number of fluid ounces in a half gallon by two. Have a look:

64 * 2 = 128

So as you can see, the answer to the question **how many ounces in a fluid gallon** is 128. So in other words, a gallon is equal to 128 fluid ounces. The gallon to ounce ratio is down below, have a look:

- 1 gallon = 128 fluid ounces.

If you already know **how many ounces in a half gallon** and **how many ounces in a gallon**, we can move on to the more practical parts of this article. Have you ever wondered **how many ounces in a gallon of water**? Is there any difference between a gallon of water and any other gallon? Keep reading to know the answer.

### How many ounces in a gallon of water

What do you think – **how many ounces in a gallon of water**? Does the result differ from the result of how many ounces in a gallon? Or maybe are the results the same? We are going to dispel all your doubts here. **So how many ounces are in a gallon of water? **In a gallon of water are 128 fluid ounces. Have a look at a ratio:

- A gallon of water = 128 fluid ounces.

So now you know **how many ounces are in gallon of water**, but how does it look when it comes to other liquids? Is the situation the same as in the case of** how many ounces in a gallon water** or maybe totally different? We will give you two more examples and then you will be able to see the relationship between them.

For instance, how many ounces in a gallon of milk? The answer is 128. So a gallon of milk is equal to 128 fluid ounces. Another example. How many ounces in a gallon of ice cream? Will this answer be different than the previous one? This time, the result is also 128. So a gallon of ice cream is equal to 128 fluid ounces.

So as you can see, all these answers are the same as to the question** how many ounces of water in a gallon**. What does it mean? Every gallon of a liquid is equal to the same. There is no difference when it comes to a gallon of water, milk, ice cream or any other gallon of liquid. So you can just remember** how many ounces is in a gallon of water**. It will be totally sufficient to remember that a gallon of water, and any other liquid, is equal to 128 fluid ounces.

At the end of this part of the article we want to show you a table with all mentioned answers. Have a look:

A gallon of: | Fluid ounces: |

Water | 128 |

Milk | 128 |

Ice cream | 128 |

### How many ounces in one gallon

The last part of this article will be the most practical. What will you find here? **Methods to make gallon to ounces conversion, in two different ways.** If you need to calculate more than one gallon to ounces, keep reading.

**The first method** is calculating on your own. To make this kind of conversion you need a formula. It will be based on **how many ounces equal gallon **ratio. A quick reminder – a gallon is equal to 128 fluid ounces. Now we can show you a ready to use formula. You can find it down below:

**The number of gallons * 128 = the result in the US fluid ounces**

As you can see, this formula is quite easy to use. You just need to multiply two numbers, nothing more. So let’s see this formula in practice. Down below you will find some practical examples explained step by step, have a look:

We will start with something small and not complicated. For instance, how many ounces in 2 gallons? What do you need to do? Multiply the number of gallons, in this case 2, by the 128. It gives 256. So 2 gallons is equal to 256 fluid ounces.

Now calculate how many ounces in 3 gallons. As in the previous example, multiply 3 by 128. It gives 384. So 3 gallons is equal to 384 fluid ounces.

Try to convert something a little bit bigger. **How many ounces in a 5 gallon? **Multiply 5 by 128. It gives 640. So 5 gallons is equal to 640 fluid ounces.

Another example. How many ounces in 15.5 gallons? And again, multiply 15.5 by 128. It gives 1984. So 15.5 gallons is equal to 1984 fluid ounces.

The last example. How many ounces in 55 gallons? Just multiply 55 by 128. It gives 7040. So 55 gallons is equal to 7040 fluid ounces.

We hope after all these examples the conversion of gallons to ounces is clear for you and you are able to make it on your own.

For your convenience, we also gathered all these results in a table. It is down below:

Gallons: | Fluid ounces: |

2 | 256 |

3 | 384 |

5 | 640 |

15.5 | 1984 |

55 | 7040 |

The first method for making gallon to ounces conversion is already behind us. **So what is the second method?** You can make gallons to ounces calculation in an easier and quicker way, that is, using a gallon to ounces converter. What is it?

A gallon to ounces converter is a web application. Simply put, it is a kind of a calculator, but automatized, with added formula. It means a gallon to ounces calculator is ready to use. You just need to enter the number of gallons which you want to convert, that’s all. After entering the data your result will be shown in a flash.

Calculating gallons to ounces on your own is not complicated, so you can ask if you really need a dedicated tool for it. Of course, you can calculate gallons to ounces on your own without big problems, but with a gallon to ounces converter it will be so much quicker and easier, especially when it comes to bigger numbers. Just a few clicks and you will have the result. Imagine this comfort! It’s amazing, isn’t it?

At the end, we want to tell you a little about a gallon to ounces converter advantages. Here are a few of them:

- You do not need to make your own calculations or know a formula. You just need to enter the number of gallons.
- You do not need another device, you can use your smartphone, tablet or laptop to use our app.
- Using a converter is totally free.

We are coming to the end of this article. We told you **how many ounces in a gallon** and **how many ounces in a half gallon** too. We showed you also **how many ounces in a gallon of water **and other liquids. At the end, we explained to you how you can make gallons to ounces calculation, both on your own and using a dedicated converter.** **

**So as you can see, this article is a huge compendium about how many ounces in a gallon. We hope that now this topic is clear for you.**

At the end, we prepared for you **FAQ**, that is frequently asked questions. You can find here only the most important and the most interesting issues. Have a look to know more about how many ounces in a gallon:

- Does 64 ounces equal 1 gallon? No, 64 ounces is not equal to 1 gallon. 64 ounces is equal to ½ gallon. It means 128 ounces is equal to 1 gallon.
- How many 32 oz bottles make a gallon? To make a gallon you need four 32 oz bottles (because 128 / 32 = 4).
- How many 16 oz are in a gallon? In a gallon are eight 16 oz (because 128 / 16 = 8).
- How many gallons is 30 ounces? 30 ounces is 0.234375 gallons (because 30 / 128 = 0.234375).