How Much Does a Gallon of Propane Weight? [Weight Chart]

Liquefied propane gas weighs 4.11 pounds per gallon at 77°F, which is equal to a density of 0.493 g/cm3 or 493 kg/m3. The exact density of propane depends on certain external factors like elevation and temperature.

But if you don’t feel like calculating and would rather just get the values from some charts, you’ve come to the right place.

We at PowerSportsGuide have compiled the most common conversion numbers into this post!

Contents show

What is Propane Gas?

Propane gas is an alternative fuel, manufactured as a by-product of processing natural gas or less frequently by refining crude oil.

It’s a colorless and odorless gas, which is why manufacturers add an identifying odor to it. In the event of a gas leak, this odor addition helps to detect the issue.

Propane is a powerful and safe fuel that powers millions of businesses and homes worldwide. It can be used for many different purposes; some of the most common of these are the following:

Vehicle fuel (cars, forklifts, buses, fleet vehicles)
Fuel for industrial engines (e.g., power generators)
Agricultural use (e.g., irrigation engines, crop drying, flame weeding)
Compressor-based refrigeration (e.g., in RVs and for camping)
Metal melting
Printing applications
Water and space heaters
Cooking
Plastic manufacturing

Beyond these, propane is used in numerous commercial and residential appliances that require an efficient portable fuel.

Commercially available propane is typically labeled as “LPG” or “LP-gas,” which are abbreviations for “liquefied petroleum gas.”

As the name suggests, propane gas is compressed and stored in liquid form, but in most cases, it’s used as a gas for powering vehicles or appliances.

Are you wondering what propane weighs per gallon when it is stored in tanks as a liquid?

Keep reading!

What does Propane Weigh per Gallon?

Under atmospheric pressure and at room temperature, propane exists in the form of a gas.

But under lower temperatures and/or higher pressure, it turns into a liquid, which is a game-changer for storage. Liquefied propane gas can be easily stored, shipped, and distributed in pressurized tanks.

According to Ferrellgas, liquid propane gas should be stored between 100 and 200 psi to keep it in liquid form.

How much does this liquefied propane gas weigh?

As a rule of thumb, propane liquid weighs 4.11 pounds per gallon at 77°F, which translates to a density of 0.493 g/cm3. Based on that, you can calculate the weight of propane by multiplying its volume (in gallons) by 4.11.

For example, 20 gallons of propane weighs:

20 gallon x 4.11 pounds/gallon = 82.2 pounds

However, the density of propane depends on the elevation and temperature. For example, the density of propane at various temperatures is as follows:

Propane density 4.05 lb./gallon at 90°F
Propane density 4.09 lb./gallon at 80°F
Propane density 4.11 lb./gallon at 77°F
Propane density 4.17 lb./gallon at 70°F
Propane density 4.20 lb./gallon at 60°F

Higher temperatures cause a decrease in propane density, which results in increased pressure inside the tank.

Because of this, the pressure inside a propane tank varies depending on the storing temperature.

The weight of one gallon of propane liquid at 77°F in various measurement units is as follows:

1 US gallon of propane = 4.11 pounds
1 US gallon of propane = 65.83 ounces
1 US gallon of propane = 1.87 kg
1 US gallon of propane = 1866.21 grams

Propane Pounds-Per-Gallon Chart

For your convenience, we’ve listed the most common conversion numbers in this propane weight chart (at a temp of 77°F):

US Gallons	Weight of Propane at 77 F (lbs)
1 lbs	4.11 lbs
2 lbs	8.22 lbs
3 lbs	12.33 lbs
4 lbs	16.44 lbs
5 lbs	20.55 lbs
6 lbs	24.66 lbs
7 lbs	28.77 lbs
8 lbs	32.88 lbs
9 lbs	36.99 lbs
10 lbs	41.1 lbs
20 lbs	82.2 lbs
30 lbs	123.3 lbs
40 lbs	164.4 lbs
50 lbs	205.5 lbs
60 lbs	246.6 lbs
70 lbs	287.7 lbs
80 lbs	328.8 lbs
90 lbs	369.9 lbs
100 lbs	411 lbs
120 lbs	493.2 lbs
200 lbs	822 lbs
250 lbs	1027.5 lbs
300 lbs	1233 lbs
330 lbs	1356.3 lbs
400 lbs	1644 lbs
500 lbs	2055 lbs
1000 lbs	4110 lbs
2000 lbs	8220 lbs
3000 lbs	12330 lbs
4000 lbs	16440 lbs
5000 lbs	20550 lbs

This chart is for informational purposes only.

How Much Propane is in One Pound?

With the inverse of the above calculation, we can get to how much propane is in one pound.

The general rule is that the volume of one pound of propane is 0.243 gallons at 77°F. Based on that, you can convert the weight of propane to gallons by multiplying the weight figure by 0.243.

For example, converting 20 pounds of propane into gallons:

20 pounds x 0.243 gallons/pounds = 4.87 gallons

Alternatively, you can divide the weight by 4.11:

20 pounds / 4.11 pounds/gallon = 4.87 gallons

Again, this is true when the propane is stored at 77°F.

As an addition, one pound of propane in various units of volume is as follows (at 77°F):

1 pound of propane = 0.243 US gallons
1 pound of propane = 0.202 Imperial gallons
1 pound of propane = 919.86 cm3
1 pound of propane = 0.03 cubic feet
1 pound of propane = 0.00092 m3

Propane Gallon-per-Pound Chart

For your convenience, we’ve listed the most common conversion numbers in this propane weight chart (at the temp of 77°F):

Weight of Propane at 77 F (lbs)	US Gallons
1 lbs	0.24 gal
2 lbs	0.49 gal
3 lbs	0.73 gal
4 lbs	0.97 gal
5 lbs	1.22 gal
6 lbs	1.46 gal
7 lbs	1.70 gal
8 lbs	1.95 gal
9 lbs	2.19 gal
10 lbs	2.43 gal
20 lbs	4.87 gal
30 lbs	7.30 gal
40 lbs	9.73 gal
50 lbs	12.17 gal
60 lbs	14.60 gal
70 lbs	17.03 gal
80 lbs	19.46 gal
90 lbs	21.90 gal
100 lbs	24.33 gal
120 lbs	29.20 gal
200 lbs	48.66 gal
250 lbs	60.83 gal
300 lbs	72.99 gal
330 lbs	80.29 gal
400 lbs	97.32 gal
500 lbs	121.65 gal
1000 lbs	243.31 gal
2000 lbs	486.62 gal
2028 lbs	493.43 gal
2422 lbs	589.29 gal
2816 lbs	685.16 gal

This chart is for informational purposes only.

Takeaways – FAQs About the Weight of Propane

What does liquid propane mean?

Liquid propane refers to liquified propane gas, often labeled as LPG or LP- gas. Under atmospheric pressure and at room temperature, propane exists in the form of a gas. But compressed propane gas converts to liquid, making its storage and shipping much easier.

Is propane stored in liquid form?

Yes, in most cases, propane is stored in a liquid form. Propane is most commonly stored and distributed in pressurized tanks, but it’s often shipped overseas in pressurised vessels.

Why is propane stored as a liquid?

The main idea behind storing propane as a liquid is that it takes up much less space in storage tanks. As reported by the U.S. Department of Energy, under the pressure of 150 psi, the energy density of liquified propane is about 270 times greater than its gas form.

How do you calculate the weight of propane?

Liquid propane weighs 4.11 pounds per U.S. gallon at 77°F, which translates to a density of 0.493 g/cm3.

How Much Does a Gallon of Propane Weight? [Weight Chart] | (2024)