Gallons to Pounds & Ounces Conversion Calculator

Enter the volume in gallons below to calculate the weight in pounds.

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1 gal = 8.345404452021 lb
1 gal = 8 lb 5.526471232336 oz
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How to Convert Gallons to Pounds

To convert a gallon measurement to a pound measurement, multiply the volume by 8.345404 times the density of the ingredient or material.

You can use this simple formula to convert:

pounds = gallons × 8.345404 × ingredient density

Thus, the volume in pounds is equal to the gallons multiplied by 8.345404 times the density of the ingredient or material.

For example, here's how to convert 5 gallons to pounds for an ingredient with a density of 0.7 g/mL.
5 gal = 5 × 8.345404 × 0.7 = 29.208916 lb

Trying to figure out how much a gallon of water weighs? It's 8.345 pounds. Learn more with our water weight calculator.

Gallons and pounds 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.

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 volume to weight conversion.

Keep reading to learn more about each unit of measure.

How Many Pounds are in a Gallon?

The actual weight of a gallon will vary depending on the density of the material. The table below shows how many pounds of various wet and dry ingredients are in a gallon.

Gallon measurements converted to pounds for commonly used ingredients.
Volume in Gallons: Weight in Pounds of:
Water Milk Cooking Oil All Purpose Flour Granulated Sugar
1/8 gal 1.0432 lb 1.0745 lb 0.917994 lb 0.55184 lb 0.881849 lb
1/4 gal 2.0864 lb 2.1489 lb 1.836 lb 1.1037 lb 1.7637 lb
1/3 gal 2.7818 lb 2.8653 lb 2.448 lb 1.4716 lb 2.3516 lb
1/2 gal 4.1727 lb 4.2979 lb 3.672 lb 2.2074 lb 3.5274 lb
2/3 gal 5.5636 lb 5.7305 lb 4.896 lb 2.9431 lb 4.7032 lb
3/4 gal 6.2591 lb 6.4468 lb 5.508 lb 3.311 lb 5.2911 lb
1 gal 8.3454 lb 8.5958 lb 7.344 lb 4.4147 lb 7.0548 lb

So, one gallon of water weighs about 8.345 pounds and one gallon of milk weighs about 8.6 pounds.

Gallons

The US liquid gallon is a unit of fluid volume equal to four quarts, eight pints, or sixteen cups.[2] 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.

Pounds

Pounds are a widely used unit of mass/weight in the United States. The National Bureau of Standards approved the international definition of the pound for use in the United States in 1959 after an agreement between six nations referred to as the International Yard and Pound Agreement.[3]

One pound is equal to 16 ounces, or 0.45359237 kilograms. In the avoirdupois or apothecaries' systems, one pound is equal to 7,000 grains.[4]

The pound is a US customary and imperial unit of weight. A pound is sometimes also referred to as a common ounce. Pounds can be abbreviated as lb, and are also sometimes abbreviated as lbs, lbm, or #. For example, 1 pound can be written as 1 lb, 1 lbs, 1 lbm, or 1 #.

References

  1. National Institute of Standards & Technology, Metric Cooking Resources, https://www.nist.gov/pml/owm/metric-cooking-resources
  2. 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
  3. National Bureau of Standards, Refinement of Values for the Yard and Pound, U.S. Department of Commerce, July 1, 1959, https://www.nist.gov/system/files/documents/2017/05/09/frn-59-5442-1959.pdf
  4. Encyclopædia Britannica, Avoirdupois weight, https://www.britannica.com/science/avoirdupois-weight

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