Ounces to Gallons Conversion Calculator
Enter the weight in ounces below to calculate the volume in gallons.
Result: Gallons
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How to Convert Ounces to Gallons
Since ounces are a unit of mass and gallons are a unit of volume, which are different physical quantities, we need to know one more physical quantity of the ingredient or substance to convert between them. In this case, we need to account for the density of the substance whenever we do a conversion.
Therefore, to convert between ounces and gallons of an ingredient or substance, we must either multiply or divide by its density, depending on which direction we are performing the conversion.
Ounces to Gallons Formula
To convert a measurement in ounces to gallons, divide the weight by the density of the ingredient or material. Note that in order for this to work, the density must be in ounces per gallon (oz/gal).
If the density is given in grams per milliliter (g/mL), then first multiply the density by 133.5265 to convert to oz/gal.
For a density given in g/mL, you can use this simple formula to convert:
gallons = ounces / 133.5265 × density
Thus, the volume in gallons is equal to the weight in ounces divided by 133.5265 times the density (in g/mL) of the ingredient, substance, or material.
For example, here's how to convert 500 ounces to gallons for an ingredient with a density of 0.7 g/mL.
gallons = 500 oz / 133.5265 × 0.7 g/mL = 5.3494 gal
This formula is for converting ounces in weight, if you're trying to convert a volume measurement in fluid ounces, try our fluid ounces to gallons calculator.
Ounce to Gallon Conversion Table
| Weight in Ounces: | Volume in Gallons of: | ||||
|---|---|---|---|---|---|
| Water | Milk | Cooking Oil | All Purpose Flour | Granulated Sugar | |
| 1 oz | 0.007 gal | 0.007 gal | 0.009 gal | 0.014 gal | 0.009 gal |
| 2 oz | 0.015 gal | 0.015 gal | 0.017 gal | 0.028 gal | 0.018 gal |
| 3 oz | 0.022 gal | 0.022 gal | 0.026 gal | 0.042 gal | 0.027 gal |
| 4 oz | 0.03 gal | 0.029 gal | 0.034 gal | 0.057 gal | 0.035 gal |
| 5 oz | 0.037 gal | 0.036 gal | 0.043 gal | 0.071 gal | 0.044 gal |
| 6 oz | 0.045 gal | 0.044 gal | 0.051 gal | 0.085 gal | 0.053 gal |
| 7 oz | 0.052 gal | 0.051 gal | 0.06 gal | 0.099 gal | 0.062 gal |
| 8 oz | 0.06 gal | 0.058 gal | 0.068 gal | 0.113 gal | 0.071 gal |
| 9 oz | 0.067 gal | 0.065 gal | 0.077 gal | 0.127 gal | 0.08 gal |
| 10 oz | 0.075 gal | 0.073 gal | 0.085 gal | 0.142 gal | 0.089 gal |
| 11 oz | 0.082 gal | 0.08 gal | 0.094 gal | 0.156 gal | 0.097 gal |
| 12 oz | 0.09 gal | 0.087 gal | 0.102 gal | 0.17 gal | 0.106 gal |
| 13 oz | 0.097 gal | 0.095 gal | 0.111 gal | 0.184 gal | 0.115 gal |
| 14 oz | 0.105 gal | 0.102 gal | 0.119 gal | 0.198 gal | 0.124 gal |
| 15 oz | 0.112 gal | 0.109 gal | 0.128 gal | 0.212 gal | 0.133 gal |
| 16 oz | 0.12 gal | 0.116 gal | 0.136 gal | 0.227 gal | 0.142 gal |
| 17 oz | 0.127 gal | 0.124 gal | 0.145 gal | 0.241 gal | 0.151 gal |
| 18 oz | 0.135 gal | 0.131 gal | 0.153 gal | 0.255 gal | 0.159 gal |
| 19 oz | 0.142 gal | 0.138 gal | 0.162 gal | 0.269 gal | 0.168 gal |
| 20 oz | 0.15 gal | 0.145 gal | 0.17 gal | 0.283 gal | 0.177 gal |
When to Convert Ounces to Gallons
Ounces and gallons are both commonly used to measure cooking ingredients.
For cooking applications, most chefs suggest measuring dry ingredients by weight rather than volume to improve accuracy in the measurements.[1] The density of dry ingredients can vary for a variety of reasons, such as compaction and clumping.
The best way to ensure an accurate conversion is to use a scale. When a scale is not available, a calculator like the one above is a good way to estimate the weight to volume conversion.
Another useful application of weight and volume conversions is chemistry. When performing chemical reactions by combining separate chemicals to produce a new chemical, one must know the exact amount of each chemical to add in order to maximize the yield of the reaction.
It is common to mix powdered chemicals with liquid, or aqueous, chemicals, and this is where it becomes very useful to convert between weights and volumes.[2]
A third application of weight and volume conversions is when shipping freight when calculating the volumetric weight for cargo and packages. Trucks, ships, and airplanes are limited in the amount of weight or volume they can transport, so if one of those quantities is known, but the limitation is on the other, then it becomes necessary to convert between the two so as not to overload the shipping vehicle.
Keep reading to learn more about each unit of measure.
What Is an Ounce?
One ounce is a unit of mass/weight equal to 1/16 of a pound or 28.349523 grams. The common ounce should not be confused with the troy ounce, which is equal to 1/12 of a troy pound.[3]
The ounce is a US customary and imperial unit of mass. Ounces can be abbreviated as oz; for example, 1 ounce can be written as 1 oz.
An ounce is frequently referred to as a unit of weight. While technically, an ounce is a measure of mass, and weight is actually a measure of force, the two are equivalent as long as we are performing our calculations on Earth.
For example, an object with a mass of 1 ounce weighs 1 ounce on Earth, but only weighs one-sixth of that on the moon, yet still has the same mass.
Learn more about ounces.
What Is a Gallon?
The US liquid gallon is a unit of fluid volume equal to four quarts, eight pints, or sixteen cups.[4] The US liquid gallon should not be confused with the US dry gallon or the imperial gallon, which are different units of measure.
The gallon is a US customary unit of volume. Gallons can be abbreviated as gal; for example, 1 gallon can be written as 1 gal.
Learn more about gallons.
References
- National Institute of Standards & Technology, Culinary Measurement Tips, https://www.nist.gov/pml/owm/culinary-measurement-tips
- CK-12 Foundation, Introductory Chemistry (CK-12) - 12.6: Mass-Volume Stoichiometry, https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/12%3A_Stoichiometry/12.06%3A_Mass-Volume_Stoichiometry
- James Bucki, Troy Ounce vs. Ounce, The Spruce, https://www.thesprucecrafts.com/troy-ounce-vs-ounce-4588158
- National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, Handbook 44 - 2019 Edition, https://nvlpubs.nist.gov/nistpubs/hb/2019/NIST.HB.44-2019.pdf