How Much Does a Full Propane Tank Weigh?

There are different reasons you may need to know the propane tank weight. Whether you are using propane for grilling or heating your house, you always need to know how much fuel you have so that you don’t run dry at a critical moment. This article explains the propane tank weight, how much propane weighs, and what you can expect when your tank is full.

What is Propane Tank Weight?

The propane tank weight is referred to as the weight, which is the overall weight of a propane tank including the tare weight along with the propane in it.  Most tanks for grills, RVs, or small appliances are measured by the amount of propane they hold in pounds; for example, a 20-pound tank. Of course, the weight of a full propane tank is much more than 20 pounds, simply because the weight must include both the propane and the metal shell known as the tare weight of the tank.

Tare Weight

Tare weight, TW is the weight of an empty tank. The majority of 20-pound propane cylinders, which are the most commonly used for grills, have a tare weight of around 17 pounds. This tare weight is stamped on the collar of your tank. To find the total weight of a propane tank, you just need to add the tare weight to the amount of propane the tank holds.

How Much Does Propane Weigh Per Gallon?

To appreciate the whole volume of a propane tank, one needs to get an idea of how much propane weighs. Propane weight per gallon is about 4.2 pounds. The weight of a typical 20-pound propane tank contains about 4.7 gallons of propane. That means a full 20-pound tank weighs about 37 pounds (17-pound weight of the tank + 20 pounds of propane).

Why Tanks Aren't Filled to 100%?

One important safety rule you should know regarding propane tanks is the ‘80% fill rule.’ Propane tanks are never filled to 100 percent capacity so that room exists for expansion of gas inside the tank. This allows for room and prevents dangerous overpressure conditions if propane in the tank expands when the temperature in a given area increases. A 20-pound propane tank would probably be around 16 pounds of propane. This means that even though the tank reads 20 pounds, it actually has only 80% of what’s contained in the liquid.

Checking Out Your Propane Left in the Tank

Propane does not have its own built-in gauges to determine how much you have left in the tank. It’s hard to tell this, though there are simple ways to check on this:

  1. Weigh the Tank
  2. Propane Gauges
  3. Water Method

Weigh the Tank

Use a scale to weigh your propane tank, subtracting the tare weight from the current total weight to leave you with the weight of propane remaining in the tank. In our example, suppose your 20-pound propane tank weighs 27 pounds and the tare weight is 17 pounds. That leaves 10 pounds of propane, or about half a full tank.

Propane Gauges

Currently in the market are propane tank gauges, which assist in measuring pressure and making an approximation of the balance of propane remaining. A few of these can be mounted directly between the gas line and the tank valve.

Water Method

One interesting method to check the propane tank weight is the water method. Pour warm water over one side of the propane tank, and then run your hand along the surface of the propane tank. The point at which it feels cool to the touch is where the propane is in the propane tank.

Full Propane Tank Weight by Size

Below is a listing of full propane tank weight for common sizes, assuming the tare weight of the tank as well as the propane inside:

Propane Tank Size

20 lbs.

100 gallons

120 gallons

250 gallons

500 gallons

Tare Weight (Empty)

17 lbs.

215 lbs

260 lbs.

485 lbs.

950 lbs.

Propane Tank Size

20 lbs.

340 lbs.

408 lbs.

850 lbs.

1,700 lbs.

Propane Tank Size

37 lbs.

555 lbs.

668 lbs.

1,335 lbs.

2,650 lbs.

Why You Should Know the Weight of Your Propane Tank?

Knowing the weight of your propane tank, you are guaranteed to have as much as you need to grill for your friends, possibly a generator in case of a power outage. We at Liquid Propane recommend checking the weight of your tank regularly to avoid running dry without warning.

Safety with Propane Tanks

Propane tanks have to be handled carefully. Since propane is flammable, mishandling it leads to accidents. Maintain the tanks in a well-ventilated area that is either sheltered from direct sunlight or extreme temperatures and under no circumstances attempt to overfill tanks. Remember a propane tank should not be more than 80% full for safety purposes. 

Make sure you get this done by some professionals who are experts in this niche. One good source for this is Liquid Propane, for expert guidance and service concerning the safe usage of propane. Let only trained professionals from trusted sources like Liquid Propane fill up your propane tanks and handle your propane requirements to avoid any possible outcomes.

To ensure your tank is always right, weigh it often and avoid a fright.

Do you Refill your Propane Tank or Get it Exchanged?

With Liquid Propane, you can refill or exchange propane, and they’ll fill your empty tank up to 80% capacity or exchange the empty for a full one. The easy way to make sure you will have enough propane to go through your grilling season without a hitch.

Conclusion

Knowing the propane tank weight is where managing your propane supply begins. In this way, you can know how much is propane weight per gallon and check the level of your tank so that you’re not caught unprepared. And whether you use it for your home or your grill, propane remains an efficient and convenient fuel. We are here at Liquid Propane to help meet all your propane needs so you can stay powered up safely and efficiently.

State Fair Giveaway

$500 Worth of Propane

Be one of the first 200 New Customers to sign-up until September 15th to get $500 worth of propane, FREE! You’ll also get 1 year free tank rental when you switch!

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NEW CUSTOMER? Fill out the New Customer Application to join IGNITE.

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LP Propane Ignite Program – Terms and Conditions

1. Eligibility and Program Requirements
To qualify for and maintain enrollment in the LP Propane Ignite Program and receive the $0.05 per gallon fuel discount, the Customer must simultaneously enroll in and maintain active status in the following three core services:

Auto Fill Delivery: The Customer authorizes LP Propane to automatically monitor, schedule, and deliver propane to the designated tank when levels dictate, bypassing the standard Will Call scheduling requirements.

Auto Pay: The Customer must maintain a valid, authorized payment method on file (Credit Card, Debit Card, or ACH/Direct Draft). Invoices will be automatically drafted within 7 days after the delivery.

Paperless Billing: The Customer agrees to receive all invoices, statements, and program communications via email. Opting out of online billing or requesting paper statements will result in a $4.95 monthly fee and disqualification from the program.

2. Fuel Discount Terms

The $0.05 per gallon discount applies exclusively to the standard market rate of propane at the exact time of delivery.

The discount is applied automatically on invoice.

This discount cannot be combined with specific commercial contract pricing or volume discounts unless expressly authorized in writing by LP Propane.

3. Tank Monitoring and Delivery Access

LP Propane may utilize physical tank monitors or advanced usage-tracking algorithms to schedule deliveries.

Access Requirements: The Customer must ensure the propane tank is always completely accessible to delivery personnel and vehicles. The pathway must be free of obstacles, locked gates, debris, or unrestrained animals within a 100-foot radius.

Seasonal Maintenance: During winter months, the Customer is legally responsible for clearing snow, ice, and paths leading to the tank. If a delivery vehicle cannot safely access the tank, the delivery will be delayed, and any emergency filling fees incurred due to subsequent low fuel levels will be billed to the Customer.

4. Credit Status and Payment Failures

If an Auto Pay transaction is declined or fails for any reason (e.g., expired card, insufficient funds), the Customer must update their account billing details immediately. If the transaction remains unprocessed for 30 days despite attempts by LP Propane to contact the Customer, the account will be automatically unenrolled from the program.

If an account balance becomes past due, LP Propane reserves the right to suspend Auto Fill privileges, pause the $0.05 per gallon discount, and transition the account to a "Will Call / Cash on Delivery" basis until the account is brought current and after review and approval of LP Propane’s credit department.

5. Program Termination or Changes

Customer Termination: Removing any of the mandatory components (Auto Fill, Auto Pay, or Paperless Billing) constitutes voluntary termination from the program. If you would like to opt out of the Ignite program you must submit 30 day written notice

Company Modifications: LP Propane reserves the right to alter, modify, or terminate the Ignite Program framework, including discount amounts or underlying eligibility terms.

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