It most likely goes there is no saying, yet a 100 lb. Propane tank is design to host 100 pounds of propane. Straight-forward, right? Well, no quite… So, how many gallons of propane room there in a 100 lb tank?

Because propane is stored and also delivered together a liquid, it deserve to be helpful to recognize what this looks choose in regards to gallons. If there’s a fairly simple answer, there are a few different determinants that can affect how plenty of gallons room actually in a 100 lb. Tank.

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The straightforward Answer


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

This is true once the propane tank is at a temperature of 60 degrees 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 in its entirety amount that usable propane in ~ the tank. These encompass water capacity and tank temperature. Let’s take a closer watch at every of these to see how they affect your propane tank supply. 

Water Capacity

Each gas cylinder will have actually a water capacity number stamped on the collar and also will look something favor “WC 240.” This is the complete mass of liquid – proclaimed in pounds – the a cylinder might hold if filled totally with water. 

However, as soon as filled v propane, gas cylinders deserve to only it is in filled approximately 42% the the water capacity. This is come accommodate because that the fluctuations in tank push as temperature change.

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

So ours tank deserve to actually organize a preferably of 100.8 lb as soon as filled.

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

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

Again, this doesn’t make a huge difference, however it have the right to still it is in a element to consider when deciding what size of tank to use.

How Temperature influence Tank Pressure


Propane does no sit unaffected in ~ propane tanks. The optimal approximately temperature (which to be assumed in the instance above) is 60 degrees Fahrenheit. At this temperature, a tank that has actually been to fill would develop a reading of about 40% ~ above a tank gauge. 

As temperatures rise, the tank gauge reading will walk up. It’s tho the very same weight the propane in the tank – the molecules have just become more spread out. 

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

The lower pressure can cause tanks to prevent working properly. Maintaining tank press up might require an ext frequent refills; also when there is still “usable” propane in the tank, the volume is no high sufficient and extr propane need to be included to bring tank pressure back up. 

How deserve to I keep My Propane at the appropriate Temperature?

Constantly making a trip to get a tank refill can be costly and also frustrating. Luckily, over there is another way to keep your tank functioning nicely through plenty the propane at the ready when you space – Propane Tank Heaters. 

Propane tank heaters effortlessly transfer heat to the tank, elevating the BTU (British thermal Energy) the the propane. In basic terms, this heat power works by transferring warmth from one thing (the tank heater) to another (the tank) – increasing the movement of that is molecules and also keeping it at optimal working temperature. 

A well-made heater will save you the trouble of make time-consuming, no to point out expensive, refills by increasing your tank temperature and, consequently, your in its entirety tank pressure. This type of heater is a safety-certified electrical blanket the wraps about the whole surface of her tank, no issue what dimension tank that is. It’s absolutely the “no-hassle” approach to temperature regulation, allowing you to usage every gallon the propane in ~ the tank.

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


Choose Propane Tank Heaters

Here at, we create the finest propane tank heating remedies on the market. Here are several of the benefits you can expect from one of our carefully-made tank heaters.

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Maintains Optimal ambient Temperature Wide range of Tank size to select FromProvides Uniform barrier of Heat across The entire TankReduces expenses By Optimizing Temperatures and also Increasing Tank EfficiencyLimits quantity of necessary RefillsCreates for sure Storage Conditions, Without danger of ExplosionsEasily Installed and also Low MaintenanceSafety Certified by UL/CSA/CE

Here in ~, our expert team specialization in heating all gas distribution systems. For your propane-heating needs, there merely is no better choice than 

Give united state a call at 801.506.0198 with any kind of questions you have. We’re always ready come help.