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Posted: April 8, 2024

How Long Will My Grill Tank Last?

FAQ — Propane Grill Cylinders

grill tank madison, tn Grilling is a favorite pastime for many in Madison, TN, especially during the warmer spring and summer months, which are just around the corner. But one question that often comes up is, “How long will my grill tank last?” The answer to this question depends on several factors.

Size of the Propane Tank

The most common size for a grill propane tank is 20 pounds, which holds about 4.7 gallons of propane. However, tanks can come in various sizes, and the larger the tank, the longer it will last. If you have a new freestanding grill, patio heater or fire pit, Trinity Gas has the 20-pound tank to keep it running. We also carry five-pound cylinders, which are ideal for campers with portable stoves or propane heating. In fact, we propane cylinders in a variety of sizes. See below for a full list of the different propane cylinder sizes we carry.

Grill Usage

How often and how long you use your grill will significantly impact how long your propane tank lasts. If you’re grilling every day for several hours, your tank will deplete much faster than if you only grill occasionally.

Grill Size and BTU Rating

The size of your grill and its BTU (British Thermal Unit) rating will also affect how long your propane tank lasts. A grill with a higher BTU rating will use more propane than one with a lower rating.

Estimating Propane Usage

A standard grill uses approximately 20,000 BTUs per hour. So, if you have a 20-pound propane tank, which provides about 430,000 BTUs, it would last for approximately 21.5 hours of grilling time.

Checking Propane Levels

It’s essential to regularly check your propane levels to avoid running out in the middle of a barbecue. One simple method is the hot water test. Pour warm water over the tank, then feel it with your hand. The area where the propane is will be cooler than the rest of the tank. If the whole tank feels the same temperature to you, then you’re probably out of propane.


While the factors outlined above provide a general guideline, individual usage can vary. Regularly checking your propane levels and understanding your grill’s propane consumption can help ensure you never run out of gas during your barbecues. Remember, safety first. Always store and handle propane tanks according to the manufacturer’s instructions.

Trust Trinity Gas

If you’re looking to purchase propane cylinders in Greater Nashville, come to Trinity Gas. We’ve supplied Tennessee residents with safe propane storage options for half a century. We sell new and filled propane cylinders, connections, adaptors, hoses and other parts and accessories.

Here’s a rundown of the propane cylinder sizes we carry:

If you require help identifying the right propane cylinder for your home, business, camper, worksite, or food truck, our friendly team is here to help! We have decades of experience and earnest dedication to your safety and well-being. We can help you find the right portable propane tank for your needs and discuss the safest way to transport, store, connect, and use it.

Contact Trinity Gas today for safe, portable propane tanks. All the cylinders we sell are DOT-approved, and we provide safe propane cylinder refilling and requalification.