You can expect an average gallon of gas weight to be about 6.3 pounds (2.9 kg).
Gasoline comes from crude oil, which contains hydrocarbons made up of hydrogen and carbon atoms.
5 Example Gallon of Gas Weights
The following chart features examples of gasoline weights for popular scenarios ranging from the lightest to the heaviest on a full tank of gas. Additional details can be found on the manufacturer’s websites. Here’s the gallon of gas weight chart:
| Example | Fuel Capacity | Weight |
| Gasoline Container/Gas Can | 1.03 U.S. gallons (3.9 L) | 6.5 lbs (3 kg) |
| Motorcycle | 5 U.S. gallons (19 L) | 32 lbs (15 kg) |
| Small Car | 12 U.S. gallons (45 L) | 76 lbs (34 kg) |
| Large Car | 15 U.S. gallons (57 L) | 95 lbs (43 kg) |
| Truck | 25 U.S. gallons (95 L) | 158 lbs (72 kg) |
Source: Rocket HQ
Additional Weight and Towing Considerations
The additional weight you will encounter with a full tank of gasoline matters when towing or transporting a vehicle. The fuel or propane gas (wet weight) in the tank adds up whether that’s a type of vehicle listed in the chart or an RV, boat, ATV, or anything else with a gasoline-fueled engine. This creates an additional weight to consider when towing and traveling.
Make sure to refer to your vehicle’s owner’s manual and read the section on towing capacity. It’s always safer to leave some extra wiggle room to not damage your engine.
It’s important to know the correct weight when looking to tow and transport your vehicle. If you’re unsure and want specific weights, you can always check the manufacture’s website or go to a local cat scale to get a more accurate weight.
To Conclude
The weight of a gallon of gas can vary from different gasoline providers and companies. This will have different values for each company based primarily on its content. Once again these numbers are average calculations to help give a standard estimate when accounting for the weight of gasoline.