How Much Does a Gallon of Propane Weigh

Propane is a colorless, odorless gas that’s used for many purposes. It can be found in camping stoves and grills, as well as in home heating systems.

Propane is also used to fuel vehicles such as forklifts and boats.

Propane has many uses because it’s so versatile; it can be stored in tanks or cylinders and transported easily by truck or train. In fact, propane has become one of the most popular fuels used today!

Uses of Propane

  • Propane is a popular fuel for cooking, heating and grilling. It’s also used in industrial applications such as welding and cutting metal.

How Much Does a Gallon of Propane Weigh?

A gallon of propane weighs between 4.24 pounds and 6.09 pounds, depending on its temperature.

The exact weight will vary based on the specific type of propane you’re using, but generally speaking, you can expect your gallon to weigh approximately 4.2 pounds when it’s at room temperature (70 degrees F).

Factors That Affect Propane Weight

  • Temperature: The colder the propane, the heavier it is.
  • Humidity: High humidity makes propane heavier than normal.
  • Elevation: As you go higher in elevation, propane becomes less dense and therefore lighter

How Temperature Affects Propane Weight

The temperature at which propane exists is also a factor in determining its weight. At higher temperatures, the substance is lighter and has less mass than it does at lower temperatures.

How Humidity Affects Propane Weight

The more moisture in the air, the heavier your propane weight will be.

In fact, if it’s raining or snowing outside and you’re using a propane tank for heating purposes, your tank could weigh as much as 10 pounds more than normal.

The reason for this is that when water vapor condenses on your propane tank–or any other metal object–it forms tiny droplets of liquid water that stick to its surface.

This causes an increase in mass due to increased density (water molecules are heavier than air molecules) and volume (more space taken up by water).

How Elevation Affects Propane Weight

The higher you go, the lower the air pressure. This means that a gallon of propane will weigh less at higher elevations than it would at sea level.

Safety Considerations

  • Proper storage. Propane is a highly flammable substance, so you should never store it in an area where there’s a risk of fire or explosion.
  • Carbon monoxide poisoning. The gas can be dangerous if inhaled, so make sure that all propane appliances are properly ventilated and have proper ventilation systems in place to prevent carbon monoxide poisoning.
  • Fire safety precautions for indoor use include keeping your tank away from heat sources like furnaces and water heaters; never leaving a portable tank unsupervised; keeping the regulator valve closed when not in use; keeping all flames away from the tank at all times–even if it’s empty! If you want more information about fire safety precautions for indoor use, check out this article from Consumer Reports: [link].

Measuring Propane Weight

To measure the weight of a gallon of propane, you’ll need to use a scale. A typical propane tank weighs between 30 and 40 pounds, depending on its size and whether it’s full or empty.

If you’re using a conversion chart, multiply your tank’s weight by 1.25 to get an estimate of how much gas is inside.

If you don’t have access to scales or conversion charts, there are other ways to determine how much propane is in your tank:


Knowing how much a gallon of propane weighs is important for safety reasons. If you’re carrying a full five-gallon tank, it can be heavy and cumbersome to carry around.

You’ll want to know the weight so that you can plan accordingly when transporting your propane tanks or storing them in your garage or shed.

You may also find this information useful if you are planning on purchasing new appliances that use propane gas as an energy source, such as grills or stoves.

You’ll want to make sure they are within reach of where they will be used so that no one has difficulty moving them around due to their weight!