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A full propane tank sits next to a fire pit, ready to fuel a cozy outdoor gathering to explain how long a propane tank last in a fire pit

How Long Will a Propane Tank Last in a Fire Pit?

Alexander Alexander
6 minute read

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Owning an outdoor propane fire pit is a source of pride for many homeowners. It adds a touch of elegance to your backyard, providing warmth, ambiance, and a perfect gathering spot for friends and family. 

However, understanding the technical aspects of propane usage, especially the lifespan of a propane tank, is essential for a seamless outdoor experience.

It can be a bit daunting to delve into the mathematical calculations involved in determining propane tank lifespan. At Lux Yard and Homes, we aim to simplify the process and provide you with a clear understanding of how long your propane tank will last.

Table of Contents

How long will a full propane tank last on a fire pit?

The duration of propane as a fuel source for fire pits depends on the tank size, fire pit BTU rating, and flame setting. A 20-pound tank can last anywhere from 8-10 hours on high to 40-50 hours on low. Join us to explain the intricacies of propane tank lifespan and optimize your outdoor experiences.


A 20-pound propane tank connected to a steel fire pit, viewed from above.20lb Propane Tank


Understanding Your Propane Tank's Lifespan

If you're a fan of cozy nights by an outdoor fire pit, understanding how long your propane tank will last is crucial. This knowledge will help you plan your outdoor gatherings and avoid unexpected interruptions. In this post, we'll delve into the factors influencing propane tank longevity and provide practical tips to maximize its usage.

Factors Affecting Propane Tank Lifespan

Several factors contribute to the duration of a propane tank's life:

Propane Tank Size

Larger tanks naturally last longer. For fire pits, common sizes are 20-pound and 40-pound tanks.


A diagram showing different sizes of propane tanks, with a circle highlighting the 20-pound tank as the most common size used for fire pits. The tank sizes shown are 5 pounds, 20 pounds, 40 pounds, 60 pounds, and 100 pounds.20-pound propane tanks are the most commonly used size for fire pits, offering a balance of portability and fuel capacity.


BTU Rating of the Fire Pit

Higher BTU ratings consume more propane.

Flame Setting

Lower settings conserve propane, while higher settings deplete it faster.

Weather Conditions

Wind and cold temperatures can increase propane consumption.

Maintenance and Care

Proper maintenance extends the tank's life.

Calculating Propane Tank Lifespan

To estimate how long your propane tank will last, you can use a simple formula:

Tank capacity (pounds) x 21,591 BTUs/pound ÷ Fire pit BTU rating = Burn time (hours)

To illustrate this, let's consider a real-life example. A 20-pound propane tank, when used on a 50,000 BTU fire pit, would typically last around 8-10 hours at its highest setting. At Lux Yard and Homes, we offer a range of fire pits with BTU ratings starting from 40,000 and going up to 65,000.

Let's break it down:

  • Lower BTU Fire Pit (40,000 BTU): With a lower BTU rating, the fire pit consumes less propane. This means a 20-pound tank could potentially last 10-12 hours or even longer, depending on the flame setting and weather conditions.
  • Higher BTU Fire Pit (65,000 BTU): A higher BTU rating leads to increased propane consumption. In this case, a 20-pound tank might last around 6-8 hours on high.


Plan your outdoor gatherings with this handy chart.

Tips for Maximizing Propane Tank Lifespan

Efficient Usage

  • Adjust the Flame Height: 

Lower Settings: For milder weather, a lower flame setting conserves propane.

Higher Settings: During colder days or windy conditions, a higher flame setting may be necessary, but it will consume more propane.

  • Use a Windbreak: 

A windbreak, such as a tall fence or a strategically placed outdoor structure, can significantly reduce heat loss. This allows your fire pit to maintain a consistent temperature while using less propane.


A backyard fire pit surrounded by chairs, with a tall wooden fence providing protection from the wind. The fire pit is burning brightly, creating a cozy and inviting atmosphere.shielding the flames from the wind, you can reduce heat loss and extend the life of your propane tank.


  • Turn Off the Fire Pit When Not in Use: 

This may seem obvious, but it's a crucial tip. Avoid leaving your fire pit burning unnecessarily, as it will continue to consume propane.

By implementing these simple techniques, you can significantly extend the lifespan of your propane tank and enjoy more hours of cozy outdoor living.

Propane Tank Proper Maintenance

Regular maintenance is key to ensuring the longevity of your propane tank and fire pit. Here are some essential maintenance tips:

  • Clean the Burner and Control Knobs:

Regularly clean the burner and control knobs to remove dirt, debris, and spider webs. This helps prevent clogs and ensures optimal performance.

  • Check for Leaks and Damage:

Periodically inspect the tank, hoses, and connections for signs of damage, leaks, or corrosion. A small leak can lead to significant propane loss and potential safety hazards.

Use a soapy water solution to check for leaks. If bubbles form, it indicates a leak.

  • Store the Tank Properly:

During off-seasons, store your propane tank in a cool, dry, and well-ventilated area, away from heat sources and direct sunlight.

Keep the tank upright to prevent potential leaks and maintain optimal performance.

  • Choosing the Right Propane Tank:

Consider your fire pit's BTU rating and your usage frequency.

Store and transport tanks safely.

Propane Tank Safety Considerations

  • Handling and Storage:

Keep tanks upright and secure.

Store in a cool, dry place.

Avoid exposure to extreme temperatures.

  • Leak Detection and Prevention:

Use soapy water to check for leaks.

Address leaks promptly.

Have regular professional inspections.

  • Emergency Procedures:

Know what to do in case of a gas leak or fire.

Frequently Asked Questions

How long will a 20 lb propane tank last at a 50,000 BTU fire pit?

Approximately 8-10 hours at full power.

Do propane fire pits use a lot of propane?

Propane consumption depends on the fire pit's BTU rating and usage patterns. Higher BTU ratings and frequent use will consume more propane.

How much propane does a fire pit use per hour?

The amount of propane used per hour varies based on the fire pit's BTU rating and flame setting. A typical 50,000 BTU fire pit can use around 2.3 pounds of propane per hour on high.

Can I use a 15 lb propane tank instead of 20 for a fire pit?

While it's possible, a 20-pound tank offers longer burn times, especially for higher BTU fire pits.

About Lux Yard and Homes

Lux Yard and Homes is dedicated to helping you create your dream outdoor living space. We offer a wide range of high-quality products, including fire pits, grills, and outdoor garden structures. Our team of experts is passionate about helping you choose the right products for your needs and providing expert advice on installation and maintenance.

If you have any further questions about propane tank usage or fire pit maintenance, please feel free to contact us. We're here to help you make the most of your outdoor living experience.

 Email us with your question  

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