
Propane is a versatile fuel with a variety of applications, including cooking, heating, and fueling vehicles. It is a popular choice for grillers due to its clean-burning properties, precise temperature control, and lack of chemical taste. When it comes to determining the weight of propane fuel, one of the key factors to consider is the gallon measurement. A gallon of propane weighs approximately 4.2 to 4.24 pounds at 60 degrees Fahrenheit. This conversion factor is essential for calculating the weight of propane fuel in various containers, such as tanks and cylinders. The weight of an empty tank, known as the tare weight (TW), is also crucial in determining the total weight of a full propane tank.
| Characteristics | Values |
|---|---|
| Weight of one gallon of propane fuel | 4.23 pounds at 60 degrees Fahrenheit |
| 4.2 pounds | |
| 4.24 pounds | |
| Weight of an empty 20-pound propane tank | 17 pounds |
| Weight of a full 20-pound propane tank | 37 pounds |
| Propane tank certifications | DOT and ACME |
| Common propane tank sizes | 60-gallon, 120-gallon, 320-gallon, 500-gallon, 1,000-gallon |
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What You'll Learn

A gallon of propane weighs 4.2 pounds
Propane is a versatile fuel with numerous applications, including cooking, heating, and fueling vehicles. It is also used in grills, portable heaters, cooking stoves, and RVs. One of the most common ways to receive propane for grilling is through a 20-pound portable cylinder, also known as a 5-gallon tank, which is widely available at home improvement, gas stations, and hardware stores.
When it comes to the weight of propane, it's important to know that a gallon of propane weighs approximately 4.2 pounds. This weight can be used to calculate the total weight of a full propane tank. To determine the weight of a full propane tank, you need to know the tare weight (TW) of the tank, which is the weight of the empty tank, and the tank's capacity in gallons.
By multiplying the tank's capacity in gallons by 4.2, you can find the weight of the propane when the tank is full. Then, add this weight to the tare weight of the tank, and you will have the total weight of the full propane tank. For example, a 20-pound tank with a tare weight of 17 pounds will weigh approximately 37 pounds when full.
Additionally, it's worth noting that propane is often compressed and stored as a liquid, and it is commonly referred to as liquefied petroleum gas, LPG, or LP. Propane is nontoxic, eco-friendly, and efficient, making it a popular choice for various applications.
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A 20-pound tank is the most common
A 20-pound propane tank is the most common for grilling. It is also referred to as a 5-gallon tank and is compatible with almost all propane refill stations. You can find these tanks at home stores, gas stations, and hardware stores.
The weight of an empty 20-pound tank is around 17 pounds, and it weighs approximately 37 pounds when full. The weight of an empty cylinder is also called the Tare Weight (TW), which is stamped on the tank's collar. The tank's capacity to hold 20 pounds of fuel is called its Water Capacity (WC). You can determine the weight of a full tank by adding the TW and WC.
To calculate the weight of propane in a 20-pound tank, you can use the formula: weight (W) = number of gallons (G) x 4.23 pounds. Propane weighs approximately 4.2 pounds per gallon at 60 degrees Fahrenheit. Therefore, a 20-pound tank, or a 5-gallon tank, will weigh around 21.15 pounds (rounded to the nearest pound).
It's important to note that the weight of a full 20-pound propane tank may vary slightly due to factors such as temperature and the specific characteristics of the tank. Additionally, when refilling a 20-pound propane tank, it is considered full when it reaches 80% capacity, which is a standard practice in the propane industry.
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Tare weight (TW) is the weight of an empty tank
A gallon of propane fuel weighs approximately 4.2 pounds or 4.23 pounds at 60 degrees Fahrenheit. Propane tanks come in various sizes, ranging from small portable cylinders to large tanks that cater to commercial and industrial demands. The weight of the propane in a tank can be calculated by multiplying the volume of propane in gallons by 4.23.
Now, to understand the weight of the propane, we must consider the tare weight (TW). The tare weight is the weight of the tank when it's empty. This is an important factor when determining the total weight of a full propane tank. The TW is usually stamped on the tank's collar or handle, and it can vary depending on the manufacturer. For a 20-pound propane tank, the tare weight is typically around 15.6 to 17 pounds.
By knowing the tare weight and the volume of propane in the tank, you can calculate the total weight of the full tank. The formula is simple: add the weight of the propane (volume in gallons x 4.23) to the tare weight. This sum will give you the total weight of the full propane tank.
For example, let's consider a 20-pound propane tank with a tare weight of 17 pounds. The weight of the propane is 20 pounds (volume in gallons x 4.23), so the total weight of the full tank would be 37 pounds (17 pounds + 20 pounds).
Additionally, it's worth noting that propane tanks have a Water Capacity (WC) marking, which indicates the amount of fuel the tank can hold. To find the weight of the propane in the tank, you can subtract the TW from the total weight. This calculation can be useful for determining how much propane is left in the tank.
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Water capacity (WC) is the amount of fuel the tank holds
Water capacity, or WC, is the amount of propane fuel a tank holds. This is different from the tare weight (TW) of a tank, which is the weight of the tank when it's empty. The WC is usually stamped on the tank along with the TW, either on the tank's handle or collar.
For example, a 20-pound propane tank typically has a TW of 15.6-17 pounds, and a WC of 20 pounds. This means that when full, the tank weighs around 37 pounds.
To calculate the weight of a full propane tank, you can multiply the tank's WC by the weight of one gallon of propane (which is approximately 4.2 to 4.24 pounds at 60 degrees Fahrenheit). So, for a 20-pound tank with a WC of 5 gallons, you would multiply 5 by 4.23, which equals 21.15 pounds.
It's important to note that propane tanks are considered full at 80% capacity. So, a 20-pound tank is considered full when it reaches around 16 pounds of propane. This is something to keep in mind when calculating the weight of a full tank.
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A full 20-pound tank weighs 37 pounds
A gallon of propane fuel weighs approximately 4.2 pounds or 4.23 pounds at 60 degrees Fahrenheit. This weight can be used to calculate the total weight of a full propane tank.
A standard 20-pound propane tank is commonly used for grilling and is also referred to as a 5-gallon tank. It is compatible with most propane refill stations and can be found at home stores, gas stations, and hardware stores.
The weight of an empty 20-pound propane cylinder, known as the Tare Weight (TW), is typically around 15.6 to 17 pounds, depending on the manufacturer. This weight is usually stamped on the tank's collar or handle.
When the 20-pound tank is full, it weighs approximately 37 pounds. This weight is calculated by adding the tare weight (17 pounds) to the weight of the propane (20 pounds), which is referred to as the Water Capacity (WC). Therefore, a full 20-pound tank weighs 37 pounds, with 20 pounds of propane fuel and 17 pounds for the weight of the cylinder itself.
It is important to note that propane tanks are considered full when they are 80% full, and the weight of the propane fuel in the tank can be calculated by multiplying the number of gallons by 4.2 or 4.23 pounds.
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Frequently asked questions
A gallon of propane fuel weighs around 4.2 pounds or 4.23 pounds at 60 degrees Fahrenheit.
An empty 20-pound cylinder weighs around 17 pounds, and a full cylinder weighs around 37 pounds.
First, multiply the number of gallons the tank can hold by 4.2 (the weight of propane per gallon). Then, add the tare weight (the weight of the empty cylinder) to find the total weight of the full tank.
The tare weight (TW) or empty weight of a propane tank is usually stamped on the tank's collar or handle.
A "full" 20-pound cylinder typically contains 4.7 gallons of propane. However, this can vary slightly depending on the temperature of the propane tank and the surrounding air during filling.









































