How long does 20lb propane tank last?

When it comes to propane tanks, there are a few things you need to know to get the most out of your purchase. This blog post will discuss how long a 20lb propane tank will last to ensure you’re making the most informed decision possible. Keep reading to learn more!

What is a 20lb propane tank?

propane, tank, liquid gas
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A 20lb propane tank is a large, stationary tank for storing propane. Propane is a highly flammable gas, so the tank must be stored in a safe and well-ventilated area. The tank is usually made of steel or aluminum and has a pressure relief valve to prevent the build-up of pressure inside the tank.

Uses of 20lb Propane Tank?

Here are a few very common uses of the propane tank.

1. Outdoor cooking appliances like grills and camp stoves

Outdoor cooking appliances like grills and camp stoves
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When it comes to outdoor cooking, portable propane tanks are very useful. A propane tank will do the job, whether you’re grilling up burgers and dogs at a summer BBQ or roasting marshmallows around the campfire.

There are a variety of outdoor cooking appliances that run on propane, including:

Grills: both gas and charcoal grills can be powered by propane tanks

Camp stoves: these small, portable stoves are perfect for cooking meals while camping or tailgating

Pizza ovens: These popular backyard additions use propane to heat up quickly and cook the pizza to perfection

2. Patio heaters

A 20 lb propane tank is used in patio heaters to provide heat to an outdoor area. The tank is filled with propane gas, which is then ignited to produce heat. The heat is then directed towards the area where the patio heater is located, warming up the space.

3. Generators

Large stationary propane tanks are used with generators. The tanks are filled with propane gas, which is then used to power the generator. The tanks are relatively lightweight, making them easy to transport, and they can provide hours of power for the generator. If you are using a generator, make sure to properly ground it!

4. Pool heaters

The propane heater uses a 20 lb propane tank to heat the water in the pool. The tank is filled with propane gas, which is then used to power the heater. The heater will raise the water temperature in the pool, making it perfect for swimming on chilly days.

5. Fireplaces

Propane cylinders are used to power a fireplace. The tank is filled with propane gas, which is then used to ignite the fire in the fireplace. The fire pit’s flame will heat the room, making it warm and comfortable.

Now that you know some common uses for a 20 lb propane tank, you may wonder how long it will last.

How long does a 20lb propane tank last?

How long does a 20lb propane tank last?
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A 20lb propane tank will last for about 18-20 hours when used continuously at a rate of 2-4 gallons per hour. This is assuming that the tank is full when it’s first used. The amount of time the tank will last will also depend on how often you use it and how much propane you use each time. If you use the propane tank occasionally, it can last for months or even years.

These factors can affect how long a 20 lb propane tank lasts.

The weather: If it’s a cold day, your propane will last shorter because the gas needs to work harder to maintain the same heat level. Conversely, your propane will last longer on a hot day because the tank is pressurized, and the gas expands in the heat.

The size of your appliance: If you’re using a small appliance, like a camp stove, your tank will last much longer than if you’re using a large appliance, like a heater.

Your usage habits: How often you use your propane appliance will affect your tank’s length. If you use it every day, it will deplete faster than if you only use it once in a while.

How to tell when a 20lb propane tank is empty?

You can use propane tank gauges to check whether the tank is empty. In case you do not have one. Here are a few signs of an empty propane tank.

How to tell when a 20lb propane tank is empty?
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1. The gas flame is lower than usual

2. The appliance is taking longer to heat up

3. There is a hissing noise coming from the tank

4. You can hear a “gurgling” noise when you turn on the appliance

5. The appliance doesn’t work at all

If you’re unsure if your tank is empty, you can check the gauge to see how much propane is left. Most propane tanks have a gauge that shows how full or empty the tank is.

What to do when your propane tank runs out?

If you find yourself in a situation where your propane tank has run out, there are a few things you can do to get it refilled quickly.

1. Check if any local stores sell and refill propane tanks.

2. Call a friend or family member who may have a spare tank that they can lend you.

3. Purchase a new tank from a local hardware store.

Propane tank refill locations

Propane tank refill locations
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You can get your 20 lb propane tank refilled in many places. Here are a few options:

1. Local stores that sell and refill propane tanks

2. Hardware stores

3. Gas stations

4. Campgrounds

5. Online retailers

How to refill a 20lb propane tank?

You can either take your empty tank to a refill station or exchange it for a full one. It’s important to note that you should only use a certified filling station to fill or exchange your propane tanks. These stations are regulated by the DOT (Department of Transportation) and must follow certain safety measures.

Here are some tips for refilling your propane tank:

1. Make sure the filling station is certified

2. Check for leaks before filling or exchanging your tank

3. Don’t overfill the tank – stop filling when the gauge reaches 80%

4. Inspect the valves and hoses for any damage

5. Use a protective cover when transporting your propane tank

The Pros and Cons of Using Propane Tanks

The Pros and Cons of Using Propane Tanks
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Now that we’ve answered the question, “How long does 20lb propane tank last,” let’s look at the pros and cons of using propane tanks as a fuel source for your grill.


1. Propane is a clean-burning fuel that doesn’t produce harmful emissions.

2. Propane grills heat up quickly, so you can start cooking sooner.

3. Propane is an inexpensive fuel source.


1. Propane tanks can be heavy and difficult to transport.

2. If not properly handled, propane tanks can be dangerous.

3. Propane can run out quickly if you’re not careful about conserving it.

Safety Tips while using 20lb Propane Tank

Propane is a highly flammable gas, so it’s important to use it safely. Here are some safety tips to keep in mind:

1. Don’t store or use propane near an open flame

2. Do not smoke. Propane burns if someone smokes around.

3. Turn off all appliances before turning off the propane tank

4. Never leave a burning appliance unattended

5. Use well-ventilated grills and stoves when cooking with propane

6. Check for leaks regularly

7. Keep your propane tank away from children and pets

8. Dispose of used or damaged propane tanks properly

Following these safety tips, you can use your propane appliances safely and enjoy them for many years.


How many BTUs are in 20lb?

BTU(British Thermal nit) is the standard unit for measuring heat efficiency. A 20lb propane tank typically contains 400,000 BTUs.

What is the difference between natural gas and propane gas?

Natural gas is methane, while propane is a byproduct of natural gas processing and petroleum refining. Propane is a liquefied petroleum gas (LPG), while natural gas is typically in a gaseous state. Natural gas is also less expensive than propane.

Is it worth switching from heating oil to propane?

Switching from heating oil to propane can be a great way to save money on your energy bills. Propane is cheaper and more efficient than heating oil, so you’ll likely see significant savings by making the switch. In addition, propane is a cleaner-burning fuel than heating oil, so it’s better for the environment.

What are ASME tanks?

ASME tanks are pressure vessels that meet the standards set by the American Society of Mechanical Engineers. They are often used for storing propane and other liquefied petroleum gases (LPG).

How long does 1lb of propane last?

It depends on how much heat you’re trying to generate. A rule of thumb is that one pound of propane will last about two hours on a standard 20,000 BTU grill. However, this will vary depending on factors such as the size and type of grill, the ambient temperature, and wind conditions.


Now that you know how long a 20lb propane tank lasts, you can use this information to help you plan accordingly. Propane is a great fuel source for grilling and other outdoor activities, but it’s important to use it safely. Follow the safety tips above and check for leaks before using your propane appliances. Thanks for reading!

About Antonio

I’m Antonio, a passionate traveler, and outdoor lover who’s running this website. I started this site to share my passion for camping, traveling, and bikepacking.