Grams to Gallons Conversion Calculator

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


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1 g = 0.000264172052 gal

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How to Convert Grams to Gallons

Since grams 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 grams 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.

Grams to Gallons Formula

To convert a measurement in grams 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 grams per gallon (g/gal).

If the density is given in grams per milliliter (g/mL), then first multiply the density by 3,785.412 to convert to g/gal.

For a density given in g/mL, you can use this simple formula to convert:

gallons = grams / 3,785.412 × density

Thus, the volume in gallons is equal to the weight in grams divided by 3,785.412 times the density (in g/mL) of the ingredient, substance, or material.

For example, here's how to convert 5,000 grams to gallons for an ingredient with a density of 0.7 g/mL.
gallons = 5,000 g / 3,785.412 × 0.7 g/mL = 1.8869 gal

When to Convert Grams to Gallons

Grams 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 a Gram?

A gram is a unit of mass equal to 1/1,000 of a kilogram or 0.035274 ounces, and is equivalent to the mass of one cubic centimeter, or one milliliter, of water.

The gram, or gramme, is an SI unit of mass in the metric system. Grams can be abbreviated as g; for example, 1 gram can be written as 1 g.

A gram is frequently referred to as a unit of weight. While technically, a gram 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 gram weighs 1 gram on Earth, but only weighs one-sixth of that on the moon, yet still has the same mass.

Learn more about grams.

What Is a Gallon?

The US liquid gallon is a unit of fluid volume equal to four quarts, eight pints, or sixteen cups.[3] 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.

Gram to Gallon Conversion Table

Gram measurements converted to gallons for commonly used cooking and baking ingredients.
Weight in Grams: Volume in Gallons of:
Water Milk Cooking Oil All Purpose Flour Granulated Sugar
250 g 0.066043 gal 0.064119 gal 0.075049 gal 0.124845 gal 0.078125 gal
500 g 0.132086 gal 0.128239 gal 0.150098 gal 0.24969 gal 0.15625 gal
750 g 0.198129 gal 0.192358 gal 0.225147 gal 0.374535 gal 0.234375 gal
1,000 g 0.264172 gal 0.256478 gal 0.300196 gal 0.49938 gal 0.3125 gal
1,250 g 0.330215 gal 0.320597 gal 0.375244 gal 0.624225 gal 0.390625 gal
1,500 g 0.396258 gal 0.384717 gal 0.450293 gal 0.74907 gal 0.46875 gal
1,750 g 0.462301 gal 0.448836 gal 0.525342 gal 0.873915 gal 0.546875 gal
2,000 g 0.528344 gal 0.512955 gal 0.600391 gal 0.99876 gal 0.625 gal
2,250 g 0.594387 gal 0.577075 gal 0.67544 gal 1.1236 gal 0.703125 gal
2,500 g 0.66043 gal 0.641194 gal 0.750489 gal 1.2485 gal 0.78125 gal
2,750 g 0.726473 gal 0.705314 gal 0.825538 gal 1.3733 gal 0.859375 gal
3,000 g 0.792516 gal 0.769433 gal 0.900587 gal 1.4981 gal 0.9375 gal
3,250 g 0.858559 gal 0.833553 gal 0.975635 gal 1.623 gal 1.0156 gal
3,500 g 0.924602 gal 0.897672 gal 1.0507 gal 1.7478 gal 1.0938 gal
3,750 g 0.990645 gal 0.961791 gal 1.1257 gal 1.8727 gal 1.1719 gal
4,000 g 1.0567 gal 1.0259 gal 1.2008 gal 1.9975 gal 1.25 gal
4,250 g 1.1227 gal 1.09 gal 1.2758 gal 2.1224 gal 1.3281 gal
4,500 g 1.1888 gal 1.1542 gal 1.3509 gal 2.2472 gal 1.4063 gal
4,750 g 1.2548 gal 1.2183 gal 1.4259 gal 2.3721 gal 1.4844 gal
5,000 g 1.3209 gal 1.2824 gal 1.501 gal 2.4969 gal 1.5625 gal


  1. National Institute of Standards & Technology, Culinary Measurement Tips,
  2. CK-12 Foundation, Introductory Chemistry (CK-12) - 12.6: Mass-Volume Stoichiometry,
  3. National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, Handbook 44 - 2019 Edition,

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