Gallons to Kilograms Conversion Calculator

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

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1 gal = 3.785411784001 kg

How to Convert Gallons to Kilograms

To convert a gallon measurement to a kilogram measurement, multiply the volume by 3.785412 times the density of the ingredient or material.

You can use this simple formula to convert:

kilograms = gallons × 3.785412 × ingredient density

Thus, the volume in kilograms is equal to the gallons multiplied by 3.785412 times the density of the ingredient or material.

For example, here's how to convert 5 gallons to kilograms for an ingredient with a density of 0.7 g/mL.
5 gal = 5 × 3.785412 × 0.7 = 13.248941 kg

Gallons and kilograms 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 Kilograms 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 kilograms of various wet and dry ingredients are in a gallon.

Gallon measurements converted to kilograms for commonly used ingredients.
Volume in Gallons: Weight in Kilograms of:
Water Milk Cooking Oil All Purpose Flour Granulated Sugar
1/8 gal 0.473176 kg 0.487372 kg 0.416395 kg 0.25031 kg 0.4 kg
1/4 gal 0.946353 kg 0.974744 kg 0.832791 kg 0.500621 kg 0.8 kg
1/3 gal 1.2618 kg 1.2997 kg 1.1104 kg 0.667494 kg 1.0667 kg
1/2 gal 1.8927 kg 1.9495 kg 1.6656 kg 1.0012 kg 1.6 kg
2/3 gal 2.5236 kg 2.5993 kg 2.2208 kg 1.335 kg 2.1333 kg
3/4 gal 2.8391 kg 2.9242 kg 2.4984 kg 1.5019 kg 2.4 kg
1 gal 3.7854 kg 3.899 kg 3.3312 kg 2.0025 kg 3.2 kg

So, one gallon of water weighs about 3.7854 kilograms and one gallon of milk weighs about 3.9 kilograms.


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.


The definition of the kilogram changed in 2019. One kilogram was previously equal to the mass of the platinum-iridium bar, known as the International Prototype of the Kilogram, which was stored in Sèvres, France.

The 2019 SI brochure now defines the kilogram using the Planck constant, and it is defined using the meter and second.[3] It is roughly equal to the mass of 1,000 cubic centimeters of water.

The kilogram, or kilogramme, is the SI base unit for weight and is also a multiple of the gram. In the metric system, "kilo" is the prefix for 103. Kilograms can be abbreviated as kg; for example, 1 kilogram can be written as 1 kg.


  1. National Institute of Standards & Technology, 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,
  3. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019,

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