# How Many Gallons In a 30 lb Propane Tank? (Propane Tank Sizes)

Have you ever asked yourself or your friend how many gallons are in a 30 lb propane tank? Well, you are at the perfect place to find the answer to such a question.

Propane tanks can come in many sizes, but one of the more popular sizes is the 30 lb tank. A 30 lb propane tank is best suited for RV and commercial grilling.

So, how many gallons are in a 30 lb propane tank?

A 30 lb propane tank holds 7 gallons of propane when completely full. As a result, most 30 lb propane tanks weigh about 55 lb when filled up. These tanks fall in the middle of the pack in terms of size because they are larger than 20 lb tanks but smaller than 40 lb ones. In reality, a 30-lb propane tank is about 80% full, so the most you can put in is 6 gallons.

Keep reading to learn more about how many gallons are in a 30 lb propane tank and when these tank sizes are ideal.

Table of Contents

## How Many Gallons Are In A 30 lb Propane Tank?

A single 30 lb propane tank can hold a maximum of 7 gallons of propane when full. As you use the propane within the tank, the number of gallons within the tank decreases.

### Does This Apply To All 30 lb Propane Tanks?

Yes. All 30 lb propane tanks are designed to hold 7 gallons of propane when full. This means that you can trust that your 30 lb propane tank contains 7 gallons whenever you first buy it or fill it up.

## How Much Does A 30 lb Propane Tank Weigh?

30 lb propane tanks typically weigh around 55 lb when full. The exact weight may differ based on the tank itself. However, the majority of 30 lb propane tanks use the same tanks and weigh 55 lb whenever they are completely filled up.

You can do the math to determine how much your tank will weigh by multiplying the weight of propane by how many gallons are present.

One gallon (G) of propane weighs about 4.125 lb. Multiply 4.125 by 7, and the 7 gallons of propane weigh about 28.875 lb. The remaining weight comes from the tank itself.

### Does This Apply To All 30 lb Propane Tanks?

Because all 30 lb propane tanks hold 7 gallons, they all have the same general weight. 55 lb is the standard for 30 lb propane tanks.

The exact weight of your tank may differ slightly based on the construction of the tank, but it will be around this ballpark.

## How Long Will A 30 lb Propane Tank Last?

It’s impossible to give a one size fits all answer to how long a 30 lb propane tank will last. How long the tank lasts ultimately depends on your propane usage.

Some people may go through a 30 lb propane tank in a week, whereas others can last six weeks.

## How Much Is A 30 lb Propane Tank?

The cost of a 30 lb propane tank differs based on your location. An empty propane tank will normally cost between \$75 and \$120. You will only need to buy this tank once, and then you can get it refilled whenever the initial propane runs out.

Propane gas typically costs between \$5 and \$6 a gallon. In some locations, propane can be refilled for as little as \$3 and \$4 a gallon. Based on these metrics, it will cost you between \$21 and \$42 to get the 30 lb propane tank refilled.

The first time you purchase a tank, you will have to pay for the physical tank and the propane. This normally ranges between \$100 and \$175.

If you decide to get a different size propane tank, the price will change as well. Smaller tanks will be more affordable because fewer materials are used. Larger tanks will cost more money given that more propane is put into the tank.

## What Are The Best Uses Of A 30 lb Propane Tank?

30 lb propane tanks are most commonly used for camping, camper trailers, and other similar jobs. In most cases, 30 lb propane tanks will hook onto the tongue of the trailer so it can supply gas for your camper stovetop, heat, or refrigerator.

Although camping is the most common purpose for a 30 lb propane tank, it can also be used for space heaters, construction heaters, and propane appliances.

If you are looking for a propane tank to use on your grill, fryer, small space heater, or mosquito magnets, a 30 lb propane tank will likely be too big. Opt for a 20 lb tank instead. It will better match the size of the appliance and will be cheaper.

In contrast, you may need a 40 lb propane tank if you have a large commercial grill, commercial heater, propane hawk torches, and other large propane appliances.

The 40 lb propane tank can hold as much as 9.4 gallons of propane, making it better suited for large jobs.

## How Does A 30 lb Propane Tank Compare To Other Sized Tanks?

Most propane tanks come in sizes 20 lb, 30 lb, or 40 lb. Each of these sizes is ideal for particular jobs and budgets.

It’s important to select the best propane tank for your specific purpose so that you don’t waste any money or select a tank that is too big or too small for the task at hand.

Here’s a look at how 20, 30, and 40 lb propane tanks compare to one another:

## Final Thoughts

If you have a 30 lb propane tank, that tank is capable of holding 7 gallons of propane. It will weigh 55 lb whenever you fill it up completely.

How long this propane tank will last and its cost will depend on various factors. You will have to consider your location and unique uses in order to get a better estimate of these circumstances.

Keep in mind that there are more tank types than 30 lb tanks. Make sure to select the best tank size for you based on your budget and the intended use of the tank.

## References

https://www.amerigas.com/about-propane/propane-tank-sizes

https://www.cnet.com/home/smart-home/ways-to-estimate-how-much-propane-you-have-left/

Mike Gilmour

Hi, I'm Mike, co-founder, and editor of RV and Playa. My passion is traveling (with my RV) and enjoying the day at the beach (Playa)! Well, I originally created this blog as a way to share what I've learned by experimenting with the RV lifestyle, and I want to help others develop in life through new skills and opportunities.

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