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Gallons to Pounds Converter

Convert from US gallons or UK gallons to pounds for a variety of different liquids, such as water, milk, gasoline and oil.

Disclaimer: Whilst every effort has been made in building our calculator tools, we are not to be held liable for any damages or monetary losses arising out of or in connection with their use. Full disclaimer.

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How much does a gallon weigh?

A US gallon of water at room temperature (70°F or 21°C) weighs around 8.33lb. A gallon of milk weighs around 8.64lb. and a gallon of gasoline weighs around 6.2 lb. 1 2

How many pounds are in a gallon?

The weight of a gallon of liquids such as milk, gasoline, liquid propane or beer is dependent upon the density of the liquid. And the density of a liquid will often depend upon the temperature at which it is being stored. To give a simple explanation, a gallon of water at room temperature will weigh less than a gallon of honey (because honey is a denser substance).

When making a conversion, it's important to remember that the US gallon is smaller than the imperial (UK) gallon. In the US, a gallon is equivalent to 128 fluid ounces. But, in the UK an imperial gallon is bigger at 160 fluid ounces.

How much does a gallon of gasoline weigh?

A US gallon of gasoline weighs around 6.2 pounds. This is based upon a gasoline density of 0.74 kg/l. The density of gasoline can vary between 0.7–0.8 kg/l depending on the level of aromatics.

How much does a gallon of diesel weigh?

A US gallon of petroleum diesel weighs about 7.1 pounds. This is based upon a density of 0.85 kg/l. The density of diesel is about 15-20% higher than that of standard gasoline because it contains larger hydrocarbon molecules, making diesel heavier than gasoline. 2

How much does a gallon of milk weigh?

A US gallon of milk weighs approximately 8.637 pounds, a quart weighs 2.16 pounds and a pint weighs 1.08 pounds. These weights are based upon a standard milk density of 1.035 kg/l. 3

Let's look at some more gallon to pounds conversions.

One gallon to pounds conversions

Liquid (1 US gallon) Density (kg/l) Weight (lb)
1 gallon of water0.998 kg/l8.329 lb
1 gallon of beer1.01 kg/l8.429 lb
1 gallon of cider1.007 kg/l8.404 lb
1 gallon of crude oil0.915 kg/l7.636 lb
1 gallon of diesel (fuel)0.85 kg/l7.094 lb
1 gallon of gasoline (petrol)0.737 kg/l6.152 lb
1 gallon of honey1.42 kg/l11.85 lb
1 gallon of ice cream0.56 kg/l4.673 lb
1 gallon of jet fuel0.804 kg/l6.71 lb
1 gallon of milk1.035 kg/l8.637 lb
1 gallon of olive oil0.92 kg/l7.678 lb
1 gallon of orange juice1.038 kg/l8.663 lb
1 gallon of paint1.198 kg/l9.998 lb
1 gallon of propane (liquid)0.493 kg/l4.114 lb
1 gallon of wine0.99 kg/l8.262 lb

Note that if you want to convert between gallons and fluid ounces, you can do so with our gallons to ounces converter.

Weighing gallons of water

The precise weight of water varies according to its density, which in turn depends on its storage temperature.

Notes on liquid densities

It's important to note that the density (mass per unit volume) of a liquid can vary depending upon many factors. These include the ingredients within the liquid, the processing method and how it is subsequently stored. Note that we also have a converter for liters and tons here.

Calculator created by Alastair Hazell

References

  1. Water Density - United States Geological Survey
  2. Diesel Fuel - Nuclear Decommissioning Case Studies, 2021
  3. Density of Milk - The Physics Factbook
  4. SI Metric - Roger Walker
  5. FAO / INFOODS Database (version 2)

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