It probably goes without saying, but a 100 lb. Propane tank is draft to host 100 pounds of propane. Straight-forward, right? Well, not quite… So, how countless gallons that propane are there in a 100 pound tank?

Because propane is stored and delivered as a liquid, it can be useful to recognize what this looks choose in regards to gallons. When there’s a fairly simple answer, there are a couple of different components that can affect how many gallons are actually in a 100 lb. Tank.

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The an easy Answer


To placed it simply, 0.236 gallons = 1 lb of propane. 

This is true as soon as the propane tank is in ~ a temperature of 60 levels Fahrenheit. 

So, 0.236 gallons x 100 pounds = 23.6 gallons.

A 100 lb. Tank holds 23.6 gallons and weighs 170 lbs. As soon as full.

Other Factors

As mentioned, over there are additional factors the can affect the all at once amount that usable propane within the tank. These encompass water capacity and tank temperature. Let’s take it a closer look at at every of this to see just how they influence your propane tank supply. 

Water Capacity

Each gas cylinder will have a water volume number stamped on the collar and will look something choose “WC 240.” This is the complete mass of liquid – stated in pounds – the a cylinder might hold if filled completely with water. 

However, as soon as filled with propane, gas cylinders can only it is in filled approximately 42% of the water capacity. This is to accommodate for the fluctuations in tank push as temperature change.

For this example, 240 (water capacity) x 0.42 (max. Capacity) = 100.8 lb.

So our tank have the right to actually organize a preferably of 100.8 lb as soon as filled.

As stated above, we understand that every lb. Propane is 0.236 gallons.

This way that 0.236 gallons x 100.8 pounds = 23.789 gallon propane.

Again, this doesn’t do a huge difference, yet it deserve to still be a factor to take into consideration when deciding what size of tank to use.

How Temperature affects Tank Pressure


Propane does not sit unaffected in ~ propane tanks. The optimal approximately temperature (which was assumed in the example above) is 60 degrees Fahrenheit. At this temperature, a tank that has actually been fill would develop a analysis of about 40% on a tank gauge. 

As temperature rise, the tank gauge analysis will walk up. It’s still the very same weight the propane in the tank – the molecules have actually just become an ext spread out. 

The turning back happens as soon as temperatures drop, so don’t be surprised when that reading goes down. This is not due to the fact that there is less usable propane in the tank – the propane has actually just become an ext dense or compact, and the volume has decreased. The chillier the temperature, the an ext the levels will change. 

The reduced pressure can reason tanks to avoid working properly. Keeping tank press up might require much more frequent refills; even when over there is tho “usable” propane in the tank, the volume is not high enough and added propane need to be added to bring tank pressure earlier up. 

How can I save My Propane at the right Temperature?

Constantly do a trip to get a tank refill can be costly and also frustrating. Luckily, over there is another way to save your tank functioning nicely v plenty the propane at the ready once you room – Propane Tank Heaters. 

Propane tank heaters effortlessly transfer warm to the tank, elevating the BTU (British heat Energy) the the propane. In an easy terms, this heat power works through transferring heat from one thing (the tank heater) to another (the tank) – increasing the activity of that molecules and keeping it in ~ optimal working temperature. 

A well-made heater will conserve you the trouble of do time-consuming, no to mention expensive, refills by increasing your tank temperature and, consequently, your all at once tank pressure. This type of heater is a safety-certified electrical blanket that wraps around the whole surface of her tank, no issue what dimension tank the is. That absolutely the “no-hassle” strategy to temperature regulation, allowing you to use every gallon that propane within the tank.

 If you generally use propane during cold weather months, a tank heater is certainly worth check out!


Choose Propane Tank Heaters

Here at, we produce the best propane tank heating remedies on the market. Below are some of the services you deserve to expect from one of our carefully-made tank heaters.

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Maintains Optimal ambient Temperature Wide range of Tank sizes to choose FromProvides Uniform obstacle of Heat across The entire TankReduces expenses By Optimizing Temperatures and Increasing Tank EfficiencyLimits lot of necessary RefillsCreates safe Storage Conditions, Without risk of ExplosionsEasily Installed and also Low MaintenanceSafety Certified by UL/CSA/CE

Here at, our experienced team specializes in heater all gas distribution systems. For your propane-heating needs, there merely is no far better choice than 

Give us a contact at 801.506.0198 with any kind of questions friend have. We’re constantly ready come help.