Most professional chefs and pastry chefs who prepare international dishes have a common problem: when they look at different recipes, they come across many units of measurement that they do not know how to convert in order to execute the recipe with maximum accuracy. They face many questions such as How Many Ounces in a Gallon
You, who are reading this article, are surely an experienced cook or pastry chef, or pharmacist who has faced the problem of unit conversion when implementing the instructions. Do not worry, in this article you will find the easiest and shortest way to convert ounces to gallons. If you also read the other articles on our website, you will be able to convert all the units you need in the easiest and most convenient way.
You can also read articles on How many teaspoons in a tablespoon, How Many Ounces in a Cup, and How Many Liters in a Gallon on our website, these unit conversions will surely be useful to you in performing recipes accurately.
Ounces
One of the smallest units for measuring mass, weight, or volume is the ounce. Both the British system and the American system make extensive use of it. This unit, which is derived from the Italian and Spanish word “onza,” is referred to by the abbreviation “oz.” Although ounces are often used interchangeably, there are actually two different types of ounces: the dry ounce and the fluid ounce.
Fluid vs Dry Ounce
In this context, the fluid ounce and the dry ounce are two units of measurement that are often misused. A fluid ounce, written as fl. oz. is used to measure liquids, while a dry ounce, abbreviated as oz. is used to measure dry quantities. This means that one ounce is a measure of weight, while the other is a measure of volume.
What is the use of Fluid ounce and Dry ounce?
In cooking, baking, nutrition, and pharmacy, a fluid ounce (fluid oz.) is a unit of measure used for both liquid and dry ingredients, with little difference in conversion between imperial and U.S. units of measure. In the imperial (British) system, a fluid ounce is equal to 28.4 milliliters, while in the U.S. system, a fluid ounce is equal to 29.6 milliliters.
Gallon
The gallon abbreviated “gal”, is a unit of measure for the capacity of liquids. The gallon was first used in England to measure wine and beer, where it had a specific capacity at the time. Both the U.S. system of measurement and the British imperial system of measurement include the gallon as a unit of measurement. Since both units of measure have different capacities, they differ from each other. Currently, there are three different types of gallons used in different parts of the world that differ from each other.
Different types of gallons
Throughout the world, three types of gallons are used to measure the volume of liquids: Imperial Gallon, US Liquid Gallon, and US Dry Gallon. Each of these gallons is used in certain countries, some of which we will mention below. Depending on where you live, you should use the gallon that is recognized as the unit of measure in your country. For example, if you live in Canada, Australia, or England, you should use the Imperial Gallon, and if you live in America, the US Liquid Gallon.
Imperial Gallon
1 Imperial gallon= 153.722 fluid ounce =4 Imperial Quarts = 4.546 liters = 277.42 cubic inches
The imperial or UK gallon has a volume of 153.722 fluid ounces or 4.54609 liters. At a temperature of 17 °C, this measure was equivalent to 10 pounds (4.54 kg) of water. The United Kingdom, Canada, the British Virgin Islands, some Caribbean countries, the Bahamas, the Cayman Islands, and Montserrat are some countries that use imperial gallons. In imperial units of measure, four quarts equal one gallon. These quarts consist of two pints, and each pint is equal to 20 fluid imperial ounces.
US Liquid Gallon
1 US liquid gallon =128 fluid ounce= 4 US liquid Quarts = 3.7854 liters = 231cubic inches
3.7854 liters or 128 fluid ounces is exactly equal to one U.S. liquid gallon. At a temperature of 17 °C, a U.S. Liquid Gallon weighs 8.34 pounds or 3.78 kilograms of water. It is 16.6% lighter than an imperial gallon.
A U.S. Liquid Gallon is divided similarly to an Imperial Gallon (a gallon is divided into four quarts, each quart into two pints, and each pint into 16 U.S. fluid ounces). 128 U.S. fluid ounces are equal to one U.S. fluid gallon.
US Dry Gallon
1 US Dry Gallon = 148.947 fluid ounces = 4 US Dry Quarts
The U.S. Dry Gallon is equivalent to 148.947 fluid ounces or 4.405 liters or 8 Winchester Bushels. This unit is used in the U.S. but is less common compared to the other two gallons.
How Many Ounces in a Gallon
The formula for converting gallons to fluid ounces is very simple and is done by a simple multiplication operation that multiplies the number of gallons by a fixed number that varies depending on the type of gallon: 128 for US liquid gallons, 153.722 for imperial gallons, and 148.947 for US Dry Gallon. To better understand these explanations, please see the formulas below. There you will also find some examples and tables to help you with the conversion.
US liquid gallon to Fluid ounces: (volume in gal) x (128)
Imperial gallon to Fluid ounces: (volume in gal) x (153.722)
US Dry Gallon to Fluid ounces: (volume in gal) x (148.947)
Example
Below are some examples that you can use to easily substitute the values you want. It is enough to identify the type of gallon used in your country and replace it with the appropriate formula.
Example 1: How many ounces are in 3 gallons? (US liquid gallons)
3×128=384
Example 2: How many ounces are in 8 gallons? (US liquid gallons)
8×128=1024
Example 3: How many ounces are in 3 gallons? (Imperial gallons)
3×153.722=461.16
Example 4: How many ounces are in 8 gallons? (Imperial gallons)
8×153.722=1229.77
Example 5: How many ounces are in 3 gallons? (US dry gallons)
3×148.947=446.82
Example 6: How many ounces are in 8 gallons? (US dry gallons)
8×148.947=1191.52
Tables
If you don’t want to use formulas, you can use the table below to convert US Liquid Gallon, Imperial Gallon, or US Dry Gallon to Fluid Ounces. Most numbers that are repeated in cooking or baking recipes are listed in the table below.
Here’s a handy kitchen conversion chart for US Liquid Gallon
| US Liquid Gallon | Fluid ounces |
| 4 Gallon | 512 fl. oz. |
| 3 Gallon | 384 fl. oz. |
| 2 Gallon | 256 fl. oz. |
| 1.5 Gallon | 192 fl. oz. |
| 1 Gallon | 128 fl. oz. |
| ½ Gallon | 64 fl. oz. |
| ¼ Gallon | 32 fl. oz. |
A handy kitchen conversion chart for Imperial Gallon
| Imperial Gallon | Fluid ounces |
| 4 Gallon | 614.88 fl. oz. |
| 3 Gallon | 461.16 fl. oz. |
| 2 Gallon | 307.44 fl. oz. |
| 1.5 Gallon | 230.58 fl. oz. |
| 1 Gallon | 153.72 fl. oz. |
| ½ Gallon | 76.86 fl. oz. |
| ¼ Gallon | 38.43 fl. oz. |
A handy kitchen conversion chart for US Dry Gallon
| US Dry Gallon | Fluid ounces |
| 4 Gallon | 595.78 fl. oz. |
| 3 Gallon | 446.84 fl. oz. |
| 2 Gallon | 297.89 fl. oz. |
| 1.5 Gallon | 223.42 fl. oz. |
| 1 Gallon | 148.94 fl. oz. |
| ½ Gallon | 74.47 fl. oz. |
| ¼ Gallon | 37.23 fl. oz. |
Ounces in a Gallon
To convert fluid ounces to gallons, simply do the opposite of what you did before. Instead of multiplying the volume in gallons by a series of numbers, you need to divide the desired volume in ounces by the same numbers. So for the US Liquid Gallon, you need to divide the volume in ounces by 128, for the Imperial Gallon you need to divide the volume in ounces by 153.72, and for the US Dry Gallon, you need to divide the volume in ounces by 148.94 to get the volume in gallon units. Please refer to the following formulas and examples
Fluid ounces to US liquid gallon: (volume in ounces) ÷ (128)
Fluid ounces to Imperial gallon: (volume in ounces) ÷ (153.722)
Fluid ounces to US Dry Gallon: (volume in ounces) ÷ (148.947)
Examples
Below are some examples that you can use to easily substitute the values you want. It is enough to identify the type of gallon used in your country and replace it in the appropriate formula.
Example 1: How many gallons are in 384 Ounces? (US liquid gallons)
384 ÷ 128=3
Example 2: How many gallons are in 461.16 Ounces? (Imperial gallons)
461.16 ÷ 153.72=3
Example 5: How many gallons are in 446.82 Ounces? (US dry gallons)
446.82 ÷ 148.94=3
How many ounces in a gallon
1 US Liquid Gallon contains 128 fluid ounces, 1 Imperial Gallon contains 153.72 fluid ounces, and 1 US Dry Gallon contains 148.94 fluid ounces.
How many ounces in a half gallon
0.5 US Liquid Gallon contains 64 fluid ounces, 0.5 Imperial Gallon contains 76.86 fluid ounces, and 0.5 US Dry Gallon contains 74.47 fluid ounces.
How many ounces in a quart
There are 32 ounces in one quart
How many OZ in 2 gallons
2 US Liquid Gallon contains 256 oz., 2 Imperial Gallon contains 307.44 oz., and 2 US Dry Gallon contains 297.89 oz.
How many OZ in 3 Gallons
3 US Liquid Gallon contains 384 oz., 3 Imperial Gallon contains 461.16 oz., and 3 US Dry Gallon contains 446.84 oz.
How many 32 oz. bottles make a Gallon
One US Liquid Gallon contains 128 ounces. Therefore Four 32 oz. Bottles make one gallon of water or other liquid.
How many 16 oz. bottles make a Gallon
One US Liquid Gallon contains 128 ounces. Therefore Eight 16 oz. Bottles make one gallon of water or other liquid.
How many 8 oz. Glasses are in a Gallon
One US Liquid Gallon contains 128 ounces. Therefore Sixteen 8 oz. Glasses make one gallon of water or other liquid.
