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How Heavy is a Hot Tub? A Comprehensive Weight Guide

You’re considering a hot tub for your home, aren’t you? It’s a fantastic idea! Hot tubs provide a luxurious space for relaxation, a fun spot for social gatherings, and even offer health benefits like improved sleep and reduced stress. But before you dive into this exciting purchase, there’s an essential factor you need to consider: the weight of a hot tub.

Understanding how heavy is a hot tub is plays a crucial role in the planning and installation process. It’s not just about the tub itself; you also need to think about the weight of a filled hot tub. When filled with water and people, the weight can increase significantly, which could impact where you can safely install it.

Whether you’re eyeing a small hot tub, a medium hot tub, or a large hot tub, each comes with its own weight considerations. The hot tub material, the hot tub size, and even the hot tub cover can all contribute to the overall weight.

A small hot tub typically weighs around 500 pounds when empty and can reach up to 3,000 pounds when filled with water and people. A medium-sized hot tub weighs between 650 to 900 pounds when empty and can weigh around 4,000 to 5,000 pounds when filled. A large hot tub, designed for six or more people, can weigh over 1,000 pounds when empty and can reach a whopping 6,000 pounds or more when filled.

Knowing the hot tub weight can help you prepare for the installation, ensure the safety of the users, and plan for potential moving or transporting scenarios. So, as you embark on this journey to enhance your home with a hot tub, let’s dive deeper into understanding the weight of a hot tub and why it matters.

Key Takeaways
The weight of a hot tub is determined by its size and capacity, material and construction, and additional features.
A small hot tub typically weighs around 500 pounds when empty and can reach up to 3,000 pounds when filled with water and people.
A medium hot tub weighs between 650 to 900 pounds when empty and can weigh around 4,000 to 5,000 pounds when filled.
A large hot tub, designed for six or more people, can weigh over 1,000 pounds when empty and can reach a whopping 6,000 pounds or more when filled.
Hot tubs can be made from a variety of materials, including acrylic, fiberglass, vinyl, and wood, each with its own weight and durability characteristics.
Additional features of a hot tub, such as built-in seating, jets, and lighting systems, can add to its overall weight.
Understanding the weight of a hot tub is crucial when planning for its installation. The chosen location must be able to handle the weight of a filled hot tub.
The weight of a hot tub plays a significant role when it comes to moving and transportation.
Safety should always be the top priority when installing and using a hot tub.
It’s often recommended to hire professionals for moving a hot tub due to the risk of injury and potential damage to the hot tub.
weight of a hot tub

What Factors Determine the Weight of a Hot Tub?

When you’re in the market for a hot tub, one of the first things you’ll notice is the variety of options available. From size and capacity to material and construction, several factors can influence the weight of a hot tub. Let’s explore these factors in detail.

Size and Capacity

The size and capacity of a hot tub are primary determinants of its weight. A small hot tub designed for two to three people will naturally weigh less than a large hot tub that can accommodate six or more.

  • A small hot tub, when empty, typically weighs around 500 pounds. But don’t forget about the weight of a filled hot tub. Once you add water and people, that weight can jump to around 3,000 pounds.
  • A medium hot tub that seats four to five people usually weighs between 650 to 900 pounds when empty. Filled with water and people, the weight can increase to around 4,000 to 5,000 pounds.
  • A large hot tub, designed for six or more people, can weigh over 1,000 pounds when empty. When filled with water and people, it can weigh as much as 6,000 pounds or more.

Material and Construction

The material and construction of a hot tub also significantly impact its weight. Hot tubs can be made from a variety of materials, including acrylic, fiberglass, vinyl, and even wood. Each material has its own weight and durability characteristics.

  • Acrylic hot tubs are popular due to their durability and resistance to wear and tear. However, they are also heavier than other types.
  • Fiberglass hot tubs are lighter than acrylic ones, but they may not be as durable.
  • Vinyl hot tubs, often inflatable, are the lightest option available. They are easy to move and install but may not offer the same longevity as hard-shell hot tubs.
  • Wooden hot tubs, while offering a rustic and natural aesthetic, are typically heavier and require more maintenance.

Additional Features

Lastly, the additional features of a hot tub can add to its overall weight. These features can include built-in seating, jets, lighting systems, and even entertainment systems like speakers or TV screens. While these features enhance the hot tub experience, they also add to the hot tub weight.

Understanding these factors is crucial when planning for the installation of your hot tub. You’ll need to ensure your chosen location can handle the weight of a filled hot tub, especially if you’re considering placing it on a deck or balcony. Remember, safety is paramount when it comes to installing and enjoying your hot tub.

hot tub temperature

Weight of a Small Hot Tub

When you’re considering a small hot tub, it’s essential to understand its weight, both when empty and filled with water. This knowledge will help you plan for installation, maintenance, and even relocation if necessary.

Weight When Empty

A small hot tub, designed for two to three people, is a compact and cozy option. It’s perfect for intimate gatherings or for those who have limited space. But don’t let its size fool you. Even a small hot tub can have a significant weight.

When empty, a small hot tub typically weighs around 500 pounds. This weight includes the shell of the hot tub, the internal components like the heater and pumps, and any additional features like built-in seating or lighting systems.

While 500 pounds might seem hefty, it’s relatively light compared to larger hot tubs. This lighter weight can make a small hot tub easier to install and move. However, it’s still crucial to ensure that the installation site can safely support this weight.

Weight When Filled With Water

Now, let’s consider the weight of a filled hot tub. Once you add water to your small hot tub, the weight increases dramatically.

Water is heavy. A single gallon weighs approximately 8.34 pounds. Considering that a small hot tub can hold around 300 gallons of water, that’s an additional 2,500 pounds approximately.

But that’s not all. You also need to account for the weight of the people using the hot tub. Assuming an average weight of 150 to 200 pounds per person, a small hot tub filled with water and accommodating two to three people can weigh close to 3,000 pounds or more.

Understanding the weight of a small hot tub, both when empty and filled with water, is crucial for safe and successful hot tub ownership. It helps you plan for installation, ensures the safety of the users, and prepares you for any potential moving or transporting scenarios. So, as you plan for your small hot tub, keep these weight considerations in mind.

medium hot tub

Weight of a Medium Hot Tub

Stepping up from a small hot tub, you might be considering a medium hot tub. These hot tubs, typically designed to accommodate four to five people, offer a balance between size and capacity. But just like with a small hot tub, it’s important to understand the weight implications.

Weight When Empty

A medium hot tub, when empty, usually weighs between 650 to 900 pounds. This weight accounts for the tub’s shell, the internal components, and any additional features. The exact weight can vary based on the specific model and the materials used in its construction.

While a medium hot tub is heavier than a small one, it’s still manageable for many installation sites. However, it’s crucial to ensure that the chosen location can support this weight. Whether you’re planning to place it on a deck, patio, or inside your home, the structure needs to be strong enough to handle the weight of a hot tub.

Weight When Filled With Water

The real weight consideration comes into play when you fill the hot tub with water. Water is deceptively heavy, and a medium hot tub can hold a substantial amount.

A medium hot tub can hold around 400 to 500 gallons of water. Given that a gallon of water weighs about 8.34 pounds, the water alone can add an additional 3,336 to 4,170 pounds to the weight of the hot tub.

But don’t forget about the people. If you have four to five people in the hot tub, that’s an additional 600 to 1,000 pounds, assuming an average weight of 150 to 200 pounds per person. So, a medium hot tub, when filled with water and people, can weigh anywhere from 4,000 to 5,000 pounds or more.

Understanding the weight of a medium hot tub, both when empty and filled with water, is crucial for your planning. It helps ensure the safety of the users, guides the installation process, and prepares you for any potential moving or transporting scenarios. So, as you plan for your medium hot tub, keep these weight considerations in mind.

large hot tub

Weight of a Large Hot Tub

If you’re planning to create a social hub or a relaxation oasis for a larger group, a large hot tub is the way to go. Designed to accommodate six or more people, these hot tubs offer ample space and features. However, with the increase in size and capacity comes an increase in weight.

Weight When Empty

When empty, a large hot tub can weigh over 1,000 pounds. This weight includes the shell, the internal components such as the heater and pumps, and any additional features like built-in seating, jets, or lighting systems.

The weight can vary based on the specific model and the materials used. For instance, a large hot tub made of acrylic will typically be heavier than one made of vinyl or fiberglass. Regardless of the exact weight, it’s clear that a large hot tub is a substantial piece of equipment.

Before installing a large hot tub, it’s crucial to ensure that the chosen location can support this weight. Whether you’re placing it on a deck, patio, or inside your home, the structure needs to be robust enough to handle the weight of a hot tub.

Weight When Filled With Water

The filled weight of a large hot tub increases significantly when filled with water. Given that a gallon of water weighs approximately 8.34 pounds, and a large hot tub can hold 600 gallons or more, the water alone can add an additional 5,000 pounds or more to the weight of the hot tub.

And then there are the people. If you have six or more people in the hot tub, that’s an additional 900 to 1,200 pounds or more, assuming an average weight of 150 to 200 pounds per person. So, a large hot tub, when filled with water and people, can weigh as much as 6,000 pounds or more.

Understanding the weight of a large hot tub, both when empty and filled with water, is crucial for your planning. It helps ensure the safety of the users, guides the installation process, and prepares you for any potential moving or transporting scenarios. So, as you plan for your large hot tub, keep these weight considerations in mind.

Making Your Hot Tub Lighter: Is It Possible?

Unfortunately, you cannot make a hot tub lighter as its weight is primarily determined by its size and the materials it is made from. However, there are some strategies you can employ to make the hot tub easier to move or transport:

  • Drain the Water: Draining the hot tub before moving it can significantly reduce its weight, making it easier to handle.
  • Disassemble the Hot Tub: If possible, taking the hot tub apart can simplify transportation and reduce its overall weight.
  • Use a Hot Tub Dolly: This special type of cart is designed to move hot tubs. It helps distribute the weight of the hot tub evenly, making it easier to maneuver.
  • Enlist Help: Moving a hot tub is a challenging task, so it’s important to have at least two or three people to help you lift and carry it.

Remember, hot tubs are heavy and cumbersome, and attempting to move them without the proper equipment and assistance can be dangerous.

The Importance of Hot Tub Weight

Once you know the total weight of the tub, you can then divide it by the size of the tub in square meters (or feet) to get a number in kilograms (or pounds) per square meter (or foot). This is the load that your surface must absolutely support. A structural engineer can help with your hot tub on deck or concrete pad designs to ensure they can withstand the full load.

If your deck space is not engineered to hold the weight of the tub water, it could collapse or cause timbers to sag. More people are injured or even killed by collapsing decks than most people realize. Therefore, it’s crucial to ensure your deck can safely support the maximum weight of your hot tub.

Factors Affecting Hot Tub Weight

Weight will vary depending on setup, piping, number of jets, number of motors, etc. Hot tub shells, due to their size, can affect the weight the most. Hot tub shells can come in a variety of materials, each having their own strengths and weaknesses. Acrylic hot tubs will be the heaviest, while plastic ones will be easier to maneuver.

  • Acrylic: Acrylic is one of the most durable materials for a hot tub shell, but it is heavier than some other options and can cost more than materials like fiberglass, plastic, and vinyl.
  • Wood: Wooden hot tubs are usually made from cedar, redwood, and other trees. They have a more natural, classic appearance but can’t be molded into smooth shapes for benches and may have higher energy costs.
  • Vinyl: Vinyl shells are less expensive and easier to move, but they are not very durable and are prone to cracks and tears.
  • Rotomolded Plastic: This type of plastic is lighter and more affordable than acrylic.

Where to Place Your Heavy Hot Tub

The closer the spa is to your back door, the more it will be used. If you own a house, many people opt for the patio. If you have the option of placing the hot tub a bit further from the door, consider whether you would be using the hot tub during winter. Your deck is often the best option, but most older decks will need to be reinforced.

If you live in an apartment, avoid placing your hot tub on the balcony due to potential leaks. Instead, consider renting out a garage space at your complex. However, the safest bet would be to consult a licensed structural engineer to make the decision for you.

How Long Can Kids Stay In Hot Tub

Why Does the Weight of a Hot Tub Matter?

You might be wondering, “Why does the weight of a hot tub matter so much?” The answer lies in three key areas: safety considerations, installation requirements, and moving and transportation. Let’s delve into each of these aspects.

Safety Considerations

Safety should always be your top priority when installing and using a hot tub. The weight of a filled hot tub can be substantial, and if the structure supporting it isn’t strong enough, it could lead to serious accidents.

For instance, if you’re planning to place your hot tub on a deck, you need to ensure the deck can handle the hot tub weight on deck. The same goes for other locations like balconies or rooftops. It’s always advisable to consult with a structural engineer or a professional installer to ensure the safety of your hot tub installation.

Installation Requirements

The weight of a hot tub also impacts its installation requirements. The heavier the hot tub, the strong foundation needs to be.

Whether you’re installing your hot tub on a concrete slab, patio, grass, or pavers, the surface needs to be able to support the hot tub weight on concrete slab, hot tub weight on grass, hot tub weight on patio, or hot tub weight on pavers.

Moreover, the weight can also affect the type of equipment needed for the installation. A heavier hot tub might require specialized machinery or more manpower to move and install.

Moving and Transportation

Lastly, the weight of a hot tub plays a significant role when it comes to moving and transportation. Whether you’re moving a hot tub to a new location in your yard or transporting a hot tub to a new home, the process can be quite challenging due to its weight.

The heavier the hot tub, the more difficult and potentially costly it is to move. It’s crucial to plan ahead and hire professionals if necessary to ensure the safe and successful relocation of your hot tub.

In conclusion, understanding the weight of a hot tub is crucial for your safety, the successful installation of the hot tub, and for any potential moving or transportation scenarios. So, as you plan for your hot tub, keep these weight considerations in mind.

Choosing the Right Foundation for Your Hot Tub

Understanding the weight of your hot tub is crucial for planning its installation, as it determines the type of foundation required to support it. The foundation you choose significantly impacts the structural integrity of your hot tub, and it should be solid enough to support the weight of the filled hot tub without causing any damage to your backyard. Let’s explore the different types of hot tub foundations:

Spa Pads

Spa pads are foundations made of interlocking plastic squares. They provide a solid and durable base for your hot tub, eliminating the need for concrete. If you plan to move your hot tub frequently, spa pads are a good choice due to their portability.

Concrete

Concrete is a highly recommended foundation for hot tubs due to its strength and durability. However, it’s worth noting that a concrete base is typically permanent. If you’re considering a portable hot tub that you might want to relocate frequently, a concrete slab might not be the best option.

Deck

A deck can be a great alternative to a concrete base. To ensure the deck can support the weight of your hot tub, you’ll need to hire a team of contractors to build a suitable structure. Remember to account for the water capacity and the weight of the occupants. Besides providing a solid foundation, a deck can enhance the aesthetic appeal of your hot tub and make it more accessible.

Brick

A brick foundation is another sturdy and durable option, similar to concrete. The base material can include gravel, sand, or rock. For optimal support, the brick base should be at least six inches thick.

Frequently Asked Questions About How Heavy is a Hot Tub

As you plan for your hot tub, you might have a few questions. Here are some of the most common queries related to the weight of a hot tub and their answers.

How do you move a hot tub yourself?

Moving a hot tub yourself can be a challenging task due to its weight and size. It requires careful planning, the right equipment, and a team of helpers. However, due to the risk of injury and potential damage to the hot tub, it’s often recommended to hire professionals for this task.

What is the weight of an 8-person hot tub?

An 8-person hot tub is one of the largest models available on the market. These tubs are often categorized as 6 to 8-person or 8 to 10-person tubs. Typically, such a sizable tub weighs between 800 to 1,000 pounds when empty. However, once filled with water, the approximate weight can skyrocket to around 6,000 pounds. Due to their substantial weight, these tubs are challenging to transport, leading many buyers to opt for built-in models.

What is the full weight of a 6-person hot tub?

A hot tub designed to accommodate at least six people is an excellent choice for families. The weight of such a tub, when filled with water, usually average weight ranges from 4,500 to 50 thousands of pounds. This weight can vary based on the tub’s design and any additional features it may have. While the weight makes transportation somewhat difficult, purchasing a new tub directly from a manufacturer may come with a transportation discount or a subsidized rate.

How much water can a 4-person hot tub hold?

Knowing the water capacity of your hot tub is crucial as it directly influences the quantity of chemicals needed for treatment and cleaning. Most hot tubs come with a manual that specifies their water capacity, eliminating the need for physical measurement. A typical 4-person hot tub typically has the capacity to hold approximately 715 liters of water when filled to capacity.

Is it hard to move a hot tub?

Yes, due to the substantial weight of a hot tub, it can be quite challenging to move. It requires careful planning, the right equipment, and a team of strong helpers. For larger hot tubs or for moves over long distances, it’s often recommended to hire professional movers.

Conclusion

As we’ve explored in this comprehensive guide, understanding the weight of a hot tub is crucial when you’re planning to add one to your home. From small to large, each hot tub comes with its own weight considerations, both when empty and filled with water.

Remember, the size and capacity of a hot tub are primary determinants of its weight. A small hot tub typically weighs around 500 pounds when empty and can reach up to 3,000 pounds when filled with water and people.

A medium-sized hot tub weighs between 650 to 900 pounds when empty and can weigh around 4,000 to 5,000 pounds when filled. A large hot tub, designed for six or more people, can weigh over 1,000 pounds when empty and can reach a whopping 6,000 pounds or more when filled.

Moreover, the weight of a hot tub plays a significant role when it comes to moving and transportation. Whether you’re moving a hot tub to a new location in your yard or transporting a hot tub to a new home, the process can be quite challenging due to its weight.

In conclusion, as you embark on your journey to enhance your home with a hot tub, keep these weight considerations in mind. This knowledge will empower you to make informed decisions, ensuring your hot tub experience is as smooth and enjoyable as possible. Happy hot tubbing!

Author

Hubert Miles | Licensed Home Inspector, CMI, CPI

Hubert Miles is a licensed home inspector (RBI# 2556) with more than two decades of experience in inspection and construction. Since 2008, he has been serving South Carolina through his company, Patriot Home Inspections LLC. As a Certified Master Inspector, Hubert is dedicated to providing his expertise in home inspections, repairs, maintenance, and DIY projects.