If you’ve ever tried to pick up a full propane tank, you know that they can be quite heavy. But how much does a full propane tank actually weigh? If you take a look at the collar or handle of the tank, you will see two important stamps on it: the WC and the TW. **The WC indicates the water capacity the tank can hold.**

The TW or tare weight represents the weight of the tank when it is empty. To know how heavy a propane tank is, you take the exact weight of the full tank propane tank by using a scale. Since the tank is only filled 80% of the capacity, we cannot exactly determine the weight of your tank.

Other factors that come into play why we do not know the exact weight depends on the size of the tank – the bigger it is the higher the WC is.

**To learn more, read below…**

Table of Contents

## How heavy is a full propane tank?

We can easily get the exact number how heavy is a full propane tank by simply weighing it, you can use a basic toilet weighing scale. Please take note that the tank is filled only to 80% of its water capacity.

For example, if you have an ordinary BBQ tank with 20-lb capacity, if you are going to a filling station, it won’t be filled to 20 lbs. It is only to be filled to 80% for safety reasons. This is because propane needs some space inside the tank to expand.

To weigh a tank to get how many gallons are still left in the tank, take note of these figures: 1 gallon of propane is equal to 4.2 lbs.

## Propane tank size determines the weight of the tank

Here are the most common propane tank sizes and the number of gallons they hold:

- 20-pound (9-kilogram) propane tank: Holds 4.6 gallons (17.4 liters) of propane

- 30-pound (14-kilogram) propane tank: Holds 7 gallons (26.5 liters) of propane

- 40-pound (18-kilogram) propane tank: Holds 9.4 gallons (35.9 liters) of propane

- 100-pound (45-kilogram) propane tank: Holds 22.5 gallons (85 liters) of propane

- 500-gallon (1,893-liter) propane tank: Holds 400 gallons (1,514 liters) of propane

- 1,000-gallon (3,785-liter) propane tank: Holds 800 gallons (3,028 liters) of propane

## Calculating the Weight of a Full Propane Tank

**Step-by-Step Guide:**

**1. Find the Tare Weight (TW): **This is the weight of the empty tank. The TW is typically stamped on the collar of the tank. It’s usually denoted in pounds (lbs).

**2. Determine the Capacity of the Tank:** This is usually measured in gallons. Common sizes for residential tanks include 5 gallons (often referred to as 20-pound tanks because of the weight of the propane they hold), 7.5 gallons, 10 gallons, and so on.

**3. Multiply the Tank’s Capacity by the Weight of Propane per Gallon: **Propane generally weighs around 4.2 lbs per gallon.

**4. Add the TW to the Weight of the Propane:** This will give you the total weight of the full propane tank.

**Example Calculations for Common Tank Sizes:**

**Formula:**

**Full tank weight = Tare Weight + (Propane weight per gallon × Tank capacity)**

**1. 20-pound tank (5-gallon capacity):**

- Assume a TW of 17 lbs.
- Propane weight = 4.2×5 = 21 lbs
- Full tank weight = 17 lbs (TW)+21 lbs = 38 lbs

**2. 30-pound tank (7.5-gallon capacity):**

- Assume a TW of 23 lbs.
- Propane weight = 4.2×7.5 = 31.5 lbs
- Full tank weight = 23 lbs (TW)+31.5 lbs = 54.5 lbs

**3. 40-pound tank (10-gallon capacity):**

- Assume a TW of 29 lbs.
- Propane weight = 4.2×10 = 42 lbs
- Full tank weight = 29 lbs (TW)+42 lbs = 71 lbs

We’re talking about **propane standard size propane cylinder** and not the bigger size tanks.

## Why does the weight of a propane tank matter?

**Plan Your Camping or Grilling Like a Pro:**

**Stay Prepared:**Ever run out of propane while cooking? By knowing your tank’s weight, you’ll know exactly how much cooking time you’ve got left.**Choose Wisely:**Planning a long trip? Decide whether to pack an extra tank or just use conservatively.

**Spot an Almost-Empty Tank in No Time:**

**Stay Safe:**Uneven propane flow can mess with your flames. Recognize a tank that’s about to be empty to prevent any flame hiccups.**Cook Perfectly:**A steady flow means even cooking. Spotting a near-empty tank ensures your BBQ remains uninterrupted.

**Save Money by Refilling Smartly:**

**Spend Less:**Why refill a tank that’s still half full? Weighing your tank before a refill can save you some cash.**Less Trips, More Savings:**Fewer trips to the refill station not only save you money but also time and effort.

In short, keeping tabs on your propane tank’s weight gives you a better grilling or camping experience. It’s all about safety, consistency, and being kind to your wallet. Remember, **not all propane tanks can be refilled**, there are those that cannot be accepted for filling.

## Weighing a Propane Tank at Home

Many of us have wondered about the amount of propane left in our tanks, especially when planning a BBQ or camping trip. While there are several ways to gauge this, one of the most accurate methods is by weighing the tank. Here’s a step-by-step guide on how you can use household scales to estimate the remaining propane based on weight:

**1. Gather What You Need:**

**A propane tank**

**A typical bathroom scale or kitchen scale (if weighing smaller tanks)**

**2. Find the Tare Weight (TW):**

This is the weight of the empty tank. You’ll often find it stamped on the collar of the tank. It’s typically labeled as “TW” followed by a number, which represents the weight in pounds.

**3. Weigh Your Tank:**

**For Larger Tanks:**Place the bathroom scale on a flat, stable surface. Gently place the propane tank on the scale and record the weight.

**For Smaller Tanks:**If using a kitchen scale, place the tank on the scale and record the weight.

**4. Calculate Remaining Propane:**

**Subtract the tare weight (TW) from the weight you recorded.**The result will be the weight of the propane left in the tank.

**Formula:**Weight of Remaining Propane = Current Tank Weight – Tare Weight (TW)

**5. Estimate the Propane Volume:**

Propane typically weighs around 4.23 pounds per gallon. To find out how many gallons you have left:

**Formula: Gallons of Remaining Propane = Weight of Remaining Propane ÷ 4.23**

## How long will a full propane tank last?

The tank can last a long time if properly maintained and not exposed to extreme temperatures. Usually the typical lifespan of a propane tank is 20 years. But when does it need to be recertified? The recertification happens 10-12 years from its manufactured date, 5 years thereafter, depending on the type of tank.

It is easy to determine if the tank you have in your possession is already due a recertification/retest, just find the stamp date on the collar of the tank. The tank is in a month-year format. If it doesn’t exist, this means that the tank has not been retested yet.

If the tank is more than 10 years old and the retest date stamp doesn’t exist, it means the tank is not safe to use because it has not undergone a test.

## How much does a propane tank cost?

The cost of a propane tank can vary depending on a few different factors, such as the size of the tank and where you purchase it from. In general, smaller propane tanks are less expensive than larger ones. For example, a 20-pound propane tank may cost around $30, while a 100-pound propane tank may cost around $150.

In addition to the size of the tank, the cost of a propane tank can also be affected by where you purchase it from. Propane tanks can be purchased from a variety of different retailers, including home improvement stores, gas stations, and specialty propane retailers. The prices at these different retailers can vary, so it may be worth shopping around to find the best deal.

Another factor that can affect the cost of a propane tank is whether you purchase it new or used. New propane tanks are typically more expensive than used ones, but they also come with a warranty and are guaranteed to be in good working condition. On the other hand, used propane tanks may be less expensive, but they may not be in as good of condition and may not come with a warranty.

## How heavy is a full propane tank vs an empty one?

A full propane tank is heavier than an empty one. This is because the weight of the propane inside the tank is included in the total weight of the tank. The weight of a propane tank can vary depending on a few different factors, such as the size of the tank and the material it is made from.

In general, propane tanks are made from either steel or aluminum. Steel tanks are typically heavier than aluminum tanks, so a propane tank made from steel will weigh more than one made from aluminum. The size of the tank is also a factor in its weight. A larger propane tank will weigh more than a smaller one, so a 60-pound propane tank that is designed to hold more propane will weigh more than a smaller tank that is designed to hold less propane.

The amount of propane inside the tank is also a factor in its weight. A full propane tank will weigh more than an empty one, as the weight of the propane inside the tank is included in the total weight of the tank. This means that the weight of a full propane tank will increase as it is filled with more propane. On the other hand, the weight of an empty propane tank will be lower, as it does not contain any propane.

It is important to keep in mind that the weight of a propane tank can vary depending on the manufacturer and the specific model of the tank. Different manufacturers may use different materials and construction methods, which can affect the weight of their propane tanks. Additionally, different models of propane tanks may have different features and capacities, which can also impact their weight.

Overall, a full propane tank is heavier than an empty one. The exact weight of a propane tank will depend on factors such as its size, the material it is made from, and how much propane it contains. It is important to consider these factors when determining the weight of a propane tank.

## Is a propane tank still heavy when empty?

A propane tank is still heavy when it is empty. The weight of a propane tank is determined by a few different factors, such as its size and the material it is made from. In general, propane tanks are made from either steel or aluminum. Steel tanks are typically heavier than aluminum tanks, so a propane tank made from steel will weigh more than one made from aluminum. The size of the tank is also a factor in its weight. A larger propane tank will weigh more than a smaller one.

The amount of propane inside the tank is also a factor in its weight. A full propane tank will weigh more than an empty one, as the weight of the propane inside the tank is included in the total weight of the tank. This means that the weight of a propane tank will decrease as it is emptied of propane. However, even when the tank is empty, it will still weigh more than if it were not a propane tank at all, as it will still have its own weight due to its size and material.

It is important to keep in mind that the weight of a propane tank can vary depending on the manufacturer and the specific model of the tank. Different manufacturers may use different materials and construction methods, which can affect the weight of their propane tanks. Additionally, different models of propane tanks may have different features and capacities, which can also impact their weight.

**Materials of a Propane Tank and How They Add to Its Weight**

Component | Significance | Weight Contribution |
---|---|---|

Steel or Aluminum Body | Main structure; withstands propane pressure. | Steel is heavy, major contributor. Aluminum is lighter, used for portability. |

Valves and Regulators | Control propane flow. | Made of brass or other metals; adds weight, but less than the tank body. |

Collar | Protects valves, displays info. | Made of steel or aluminum; contributes, but not as much as the body. |

Foot Ring | Keeps tank upright and stable. | Made of steel or aluminum; contributes a smaller portion to total weight. |

Paint and Coatings | Protects against corrosion and damage. | Weight is minimal but can be noticeable especially on large tanks. |

Safety Mechanisms | Ensures safe storage and usage (e.g., pressure relief). | Not very heavy individually, but essential and do add to the overall weight. |

## Is a steel propane tank heavier than aluminum?

A steel propane tank is typically heavier than an aluminum one. The weight of a propane tank is determined by a few different factors, such as its size and the material it is made from. In general, steel is a denser and heavier material than aluminum, so a propane tank made from steel will weigh more than one made from aluminum.

The size of the propane tank is also a factor in its weight. A larger propane tank will weigh more than a smaller one, regardless of the material it is made from. This means that a larger steel propane tank will weigh more than a smaller aluminum propane tank, but it will also weigh more than a smaller steel propane tank.

The amount of propane inside the tank is also a factor in its weight. A full propane tank will weigh more than an empty one, as the weight of the propane inside the tank is included in the total weight of the tank. This means that the weight of a propane tank will increase as it is filled with more propane, regardless of the material it is made from.

It is important to keep in mind that the weight of a propane tank can vary depending on the manufacturer and the specific model of the tank. Different manufacturers may use different materials and construction methods, which can affect the weight of their propane tanks. Additionally, different models of propane tanks may have different features and capacities, which can also impact their weight.

## To make a conclusion

The weight of a full propane tank can vary depending on the size of the tank and the amount of propane it holds. Small portable propane tanks, such as those used for camping or outdoor grilling, can weigh as little as 20 pounds when full. Larger propane tanks, such as those used for home heating or cooking, can weigh upwards of 100 pounds or more when full. It is important to be aware of the weight of your propane tank, particularly if you need to move it or transport it. Always use caution when handling a full propane tank, and seek assistance if necessary to avoid injury.

Mike is an experienced propane technician with over 15 years of professional experience in the field. He has dedicated his career to helping customers with their propane needs, from installation to maintenance and repair. Together with Jeremy, he co-founded this website to provide useful information and guidance to customers seeking reliable propane services.