It more than likely goes without saying, however a 100 lb. Propane tank is design to host 100 pounds that propane. Straight-forward, right? Well, no quite… So, how countless gallons that propane room there in a 100 pound tank?

Because propane is stored and also delivered as a liquid, it deserve to be useful to understand what this looks prefer in terms of gallons. If there’s a fairly simple answer, there space a couple of different factors that can affect how countless gallons space actually in a 100 lb. Tank.

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The straightforward Answer


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

This is true once the propane tank is at a temperature the 60 degrees Fahrenheit. 

So, 0.236 gallons x 100 pounds = 23.6 gallons.

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

Other Factors

As mentioned, there are additional factors the can influence the as whole amount of usable propane within the tank. These include water capacity and also tank temperature. Let’s take a closer look at each of this to see exactly how they affect your propane tank supply. 

Water Capacity

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

However, as soon as filled with propane, gas cylinders deserve to only it is in filled as much as 42% of the water capacity. This is come accommodate for the fluctuations in tank push as temperatures 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 once filled.

As mentioned 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 make a large difference, but it have the right to still be a aspect to take into consideration when deciding what dimension of tank to use.

How Temperature influence Tank Pressure


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

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

The reverse happens once temperatures drop, so don’t be surprised when that analysis goes down. This is not because there is less usable propane in the tank – the propane has just become more dense or compact, and the volume has actually decreased. The colder the temperature, the an ext the levels will change. 

The reduced pressure can reason tanks to prevent working properly. Maintaining tank push up might require more frequent refills; also when over there is quiet “usable” propane in the tank, the volume is not high enough and extr propane have to be included to bring tank pressure earlier up. 

How have the right to I store My Propane in ~ the best Temperature?

Constantly make a trip to obtain a tank refill have the right to be costly and also frustrating. Luckily, there is another method to keep your tank functioning nicely v plenty that propane at the ready as soon as you space – Propane Tank Heaters. 

Propane tank heaters effortlessly transfer heat to the tank, raising the BTU (British heat Energy) the the propane. In an easy terms, this heat energy works through transferring heat from one thing (the tank heater) to one more (the tank) – raising the motion of the molecules and keeping it at optimal working temperature. 

A well-made heater will save you the problem of making time-consuming, no to mention expensive, refills by elevating your tank temperature and, consequently, your all at once tank pressure. This kind of heater is a safety-certified electrical blanket the wraps roughly the entire surface of your tank, no issue what size tank it is. That absolutely the “no-hassle” strategy to temperature regulation, enabling you to usage every gallon the propane within the tank.

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


Choose Propane Tank Heaters

Here at, we develop the best propane tank heating options on the market. Below are several of the benefits you have the right to expect from among our carefully-made tank heaters.

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Maintains Optimal ambient Temperature Wide range of Tank size to pick FromProvides Uniform barrier of Heat across The whole TankReduces prices By Optimizing Temperatures and Increasing Tank EfficiencyLimits quantity of crucial RefillsCreates safe Storage Conditions, Without danger of ExplosionsEasily Installed and Low MaintenanceSafety Certified by UL/CSA/CE

Here at, our expert team specialization in heating all gas distribution systems. For your propane-heating needs, there just is no much better choice 보다 

Give us a speak to at 801.506.0198 with any type of questions you have. We’re always ready come help.