What is 5 gallons of gas weigh?

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

On this page:

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 lb1 gallon of beer1.01 kg/l8.429 lb1 gallon of cider1.007 kg/l8.404 lb1 gallon of crude oil0.915 kg/l7.636 lb1 gallon of diesel (fuel)0.85 kg/l7.094 lb1 gallon of gasoline (petrol)0.737 kg/l6.152 lb1 gallon of honey1.42 kg/l11.85 lb1 gallon of ice cream0.56 kg/l4.673 lb1 gallon of jet fuel0.804 kg/l6.71 lb1 gallon of milk1.035 kg/l8.637 lb1 gallon of olive oil0.92 kg/l7.678 lb1 gallon of orange juice1.038 kg/l8.663 lb1 gallon of paint1.198 kg/l9.998 lb1 gallon of propane (liquid)0.493 kg/l4.114 lb1 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.

Thanks for e-mailing Information Please. According to the Science and Technology Desk Reference, the weight of a gallon of common fuel (such as gasoline) is six pounds. A gallon of water, on the other hand, weighs about 8.4 pounds.

Many owners pump their cars with fuel but never stop to think about just what they’re pouring inside the tank. Gas has unique properties, like weight and density, which all play an essential part. In this piece, we’ll try to understand how much gas weighs and why that matters. 

What is 5 gallons of gas weigh?

How Much Does A Gallon of Gasoline Weigh?

The weight of a gallon of gasoline is about six pounds. There is a slight difference depending on the type of gasoline and its additives. Unlike water, which weighs about 8.4 pounds per gallon, gasoline is 25% lighter.

Many people instinctively think that all liquids weigh the same as water, which is inaccurate. This misconception can create problems, especially when you end up in an emergency where you run out of fuel. Knowing gasoline weight can help a great deal here, as you would be able to accurately estimate just how much fuel you can carry.

What Factors Influence The Weight Of Gasoline?

The Science and Technology Desk Reference claims the weight of the U.S. gasoline gallon is 6.1 pounds. Fuel quality can have a slight impact on the weight of gasoline.

Gas stations in the U.S. sell three primary grades of gasoline based on the octane level: Regular (the lowest-grade octane fuel – generally 87), Midgrade (the middle range octane fuel – typically 89–90), and Premium (the highest-grade octane fuel – usually 91–94). Regular fuel is the lightest and weighs about 6.073 pounds per gallon in +59 F temperature, while Midgrade and Premium gas weigh 6.35 pounds and 6.27 pounds, respectively, in the same conditions.

Temperature heavily influences gas weight. For instance, a gallon of premium 93-octane fuel fluctuates between 5.93 to 6.42 pounds, depending on temperature and additives like methanol, water, and benzene. Volume is another heavily dependent factor, but it’s easy to make calculations. An increase of 1 F adds one ppm to the volume, meaning a temperature difference of 30 F may expand it by 3%. All this means that if you’re, for instance, refueling during winter, you will be pouring more gas into the vehicle. 

How Much Does My Full Fuel Tank Weigh? 

Some owners believe that driving around with a half- or quarter-empty tank would save money as the car becomes lighter. It rings true in theory but doesn’t help you save money on fuel in practice. 

Small tanks can hold about 12 gallons, larger ones close to 15-20, and SUV or large truck tanks can accommodate 27 gallons. So, if we averaged out the capacity and fuel weight, we’d conclude that a full tank could weigh anywhere from 73 to 165 pounds, about the weight of a teenager. But it doesn't make a huge difference compared to the average vehicle weight of 2000 to 5000 pounds. Plus, driving close to an empty tank can bring about various car issues.

Diesel Vs. Gasoline

Diesel is heavier than gasoline; it weighs about seven pounds per gallon (a bit less in the US and a bit more in Canada). The difference is due to its higher density and the number of molecules. Knowing that could save you one day, as regular gasoline and diesel shouldn’t be mixed.

If your vehicle requires gasoline, and you put diesel in the tank, it would go down the engine tube as it's heavier. On the contrary, in a diesel-based car, regular fuel would float to the top and stay there until all the diesel is burned. So, if you end up accidentally mixing the fluids, both scenarios could create serious vehicle issues, requiring you to go for a procedure called “gastric lavage”. And even though you may get lucky and get a pass when it occurs for the first time, it’s best not to tempt fate and be careful.


Gasoline weight is an essential factor not to be overlooked, especially in emergencies where you run out of fuel. Things like octane level temperature and additives further influence it, which is useful to remember. 

However, most of the time, people don’t go for precise measurements. And, if you want to be practical about it, remember that gasoline weighs about 6 pounds per gallon, about 25% lighter than water.

How heavy is a full 5 gallon gas can?

Size: 5 gal. Weight: 3.85 lbs.

How much does a 5 gallon gas jug weigh?

Size: 5 gal. Weight: 3.6 lbs.

How much does 1 gallon of gas weigh?

The weight of a gallon of gasoline is about six pounds. There is a slight difference depending on the type of gasoline and its additives. Unlike water, which weighs about 8.4 pounds per gallon, gasoline is 25% lighter.

Is 5 gallons of gas heavier than 5 gallons of water?

In comparison to gas, water weighs 8.4 pounds. That's more than a 2 pound difference – which explains why gas floats on water.