If you’re thinking about getting a hot tub, one of the first questions that probably comes to mind is “How heavy is a hot tub?”. It’s not just about the size or the features, but also the total weight once it’s filled with water and people. This matters because you’ll need to make sure your deck, patio, or floor can handle it safely. Let’s break it down in a simple and clear way so you can plan your setup confidently.
Understanding Hot Tub Weight Basics
The average weight of a hot tub depends on several factors, such as its seating capacity, construction material, insulation quality, and the number of pumps or additional features like waterfalls and LED lighting. When estimating how much support your deck or patio needs, you should always look at two separate measurements.
- Hot tub weight empty refers to the dry weight of the unit, including the outer shell, internal frame, pumps, insulation, and control systems. Acrylic spas are heavier than inflatable or rotomolded ones due to their thicker structure and reinforced frame. This is the weight you would consider during delivery and installation when professional movers place it into its final position.
- The weight of the hot tub with water is the full operational weight, including gallons of water and the combined average weight of bathers. Water is heavy, roughly 8.3 pounds per gallon, so even a compact 200-gallon hot tub adds over 1,600 pounds of water weight alone.
The difference between empty and filled weight can easily reach several thousand pounds. A simple two-person hot tub may weigh under 400 pounds empty, but a fully loaded six or seven-seater can exceed 5,000 pounds, comparable to a mid-size SUV.
Average Weights by Size
Here’s a general idea of how much different sizes of hot tubs weigh:
| Hot Tub Size | Hot Tub Weight Empty | Weight of Hot Tub with Water | Typical Capacity |
| 2-Person | 500 to 700 lbs | 2,500 to 3,000 lbs | 2 people |
| 4-Person | 700 to 900 lbs | 3,500 to 4,000 lbs | 4 people |
| 6-Person | 900 to 1,200 lbs | 4,500 to 5,500 lbs | 6 people |
| 8+ Person | 1,000 to 1,500 lbs | 5,000 to 6,500 lbs | 8 or more people |
As you can see, how much a 6-person hot tub weighs depends on its design, but it usually lands between 900 and 1,200 pounds when empty and more than 5,000 pounds when full.
What Affects Hot Tub Weight?
Several factors influence the total hot tub weight. Understanding these can help you choose a model that fits your space and structural support.
1. Size and Seating
More seats mean more water and a heavier shell. Compact models are easier to handle, while family-sized tubs can be much heavier.
2. Material
Hot tubs made from acrylic or fiberglass are heavier than inflatable or plastic models. Acrylic tubs are durable and well-insulated, but they add to the weight.
3. Water Capacity
Water adds a significant load. Each gallon of water weighs about 8.34 pounds. A typical six-person tub holds around 400 to 500 gallons, so water alone adds 3,000 to 4,000 pounds.
4. Accessories
Covers, pumps, steps, and built-in jets can increase total weight. Always check manufacturer specifications before installation.
How Much Does a Full Hot Tub Weigh?
The answer depends on your model’s size and features. To estimate how much a full hot tub weighs, you can use a simple formula:
Empty Weight + (Water Capacity × 8.34) + (Average Weight of Users)
For instance, if your tub weighs 900 lbs empty, holds 450 gallons of water, and fits six people averaging 175 lbs each, here’s how it adds up:
900 + (450 × 8.34) + (6 × 175) = 900 + 3,753 + 1,050 = 5,703 lbs
So, the weight of a hot tub with water and people can easily exceed 5,700 pounds. That’s a serious load for a deck or floor, so checking weight limits and supports is critical.
Can Your Deck or Patio Handle It?
Before installation, it’s important to confirm that your surface can support the total hot tub weight.
- Concrete patios usually handle the load without issues.
- Decks might need reinforcement, especially for large models.
- Indoor floors should be evaluated by a structural engineer before installation.
If you’re unsure, always get a professional opinion before placing your tub. It’s better to strengthen the base now than risk damage later. Most decks are designed to support about 40 to 60 lbs per square foot, while a hot tub can exceed 100 lbs per square foot when filled. Reinforcement is almost always required for upper-level installations.
Portable vs. In-Ground Models
When comparing the weight of hot tubs, empty, portable models tend to be lighter. In-ground versions, made from concrete or tile, can weigh thousands of pounds even before adding water.
| Type | Empty Weight Range | Full Weight Range | Key Advantage |
| Portable Acrylic | 500 to 1,200 lbs | 3,000 to 6,000 lbs | Easy to install |
| Inflatable | 100 to 200 lbs | 2,000 to 2,500 lbs | Lightweight and affordable |
| In-Ground | 1,500 to 3,000 lbs | 7,000+ lbs | Permanent and durable |
If you plan to move your tub occasionally, a portable model makes sense. Inflatable versions are even easier to relocate, though they might lack the durability and luxury of hard-shell designs. Some large in-ground concrete spas can weigh over 10,000 lbs when full.
Considering Other Relaxation Options
While thinking about your hot tub weight, it’s also worth looking into other relaxation products. For example, many homeowners pair their spa area with outdoor saunas for sale to create a full wellness space in their backyard. Both options offer comfort, relaxation, and a touch of luxury without taking up too much extra space.
Tips for Moving a Hot Tub
If you need to move or install your spa, here are a few simple steps to make it easier:
- Drain the water completely before moving.
- Use lifting straps and dollies to handle the weight safely.
- Have at least four people to help with larger tubs.
- Avoid dragging the base, as it can crack or damage surfaces.
- Plan the route and clear obstacles ahead of time.
Always check the manufacturer’s guide for weight and handling instructions specific to your model.
Maintenance and Longevity
A heavy spa isn’t just about the structure; it’s also about care. Keep your hot tub in good shape by maintaining clean water, checking filters, and inspecting jets regularly. Proper maintenance helps reduce stress on the internal components, keeping your system running smoothly for years.
Also, be cautious with additives or harsh chemicals that might wear down the shell or jets over time. A well-maintained tub can last over a decade, providing you with countless relaxing evenings.
Conclusion
Understanding hot tub weight is more important than most people think. It affects where you place your spa, how you prepare your foundation, and even what type of model you should buy.
Remember, the average weight of hot tub units can range from a few hundred pounds empty to over 6,000 pounds when full. Always check your manufacturer’s details before making any setup decisions. With the right preparation, you’ll enjoy your new spa safely and comfortably for years to come.
If you’re in the market for refurbished hot tubs for sale, check out Colorado Springs Hot Tubs. We offer a wide selection of quality models that suit every budget and space. It doesn’t matter if you are adding a spa to your patio or upgrading your existing setup; we can help you find the perfect match.
