What Are the Dimensions of a 6 Person Hot Tub? Standard Sizes

Looking for the perfect 6-person hot tub? Choosing the right size matters for comfort, safety, and space. 

From length and width to water capacity and installation needs, understanding standard dimensions helps you make the best choice. 

Read on to discover everything you need to know to pick a hot tub that fits your home and lifestyle.

• Know Your Space: A 6-person hot tub usually measures 7–8 feet long, 6–7 feet wide, and 32–40 inches deep.
  
  

• Compare Sizes: Smaller tubs fit 2–4 people, while larger models can seat 7+ with more water capacity.
  
  

• Plan for Clearance: Leave 2–3 feet around most sides, and 3–4 feet near equipment for safe use and maintenance.
  
  

• Check Water Capacity: Most 6-person tubs hold 300–475 gallons, depending on depth, design, and seats.
  
  

• Support Matters: Ensure your foundation or slab can handle 4,500–8,000+ pounds when filled with water and occupants.

A 6-person hot tub typically measures around 6’6″ – 7’9″ in length, 6’4″ – 7’9″ in width, and 32″ – 40″ in depth, giving plenty of room for group relaxation without feeling cramped. 

Compared to smaller 2–4 person hot tubs, which usually range from 5’4″ – 7′ long and 5’4″ – 6’8″ wide, a 6-person model provides more seating and water capacity, generally holding between 250–450 gallons. 

Larger hot tubs for 7+ people can stretch up to 9′ and hold 450–600 gallons or more. When planning installation, it’s important to leave enough clearance for both comfort and maintenance, about 2 to 3 feet around most sides, and 3 to 4 feet on the sides with access panels or equipment. 

This ensures safe use, easy servicing, and space for extras like steps or rails. Since each brand and model may vary slightly, it’s always a good idea to check the exact specifications and requirements before making your final decision.

Small hot tubs are a great choice for couples or households with limited space, offering comfort and relaxation without taking up too much room. 

Typically designed for 2–3 people, these cozy tubs fit well on patios or small backyards while still providing the luxury of hydrotherapy jets. 

On average, a small hot tub measures around 5’4″ to 7′ in length, 5’4″ to 6’8″ in width, and stands about 2’4″ to 2’9″ tall.

Many models, such as the Sundance® Spas Alicia, are compact yet surprisingly spacious, making them ideal for intimate gatherings. 

In terms of water capacity, most small hot tubs hold between 150–200 gallons, enough to enjoy a soothing soak without high water usage. 

Weight is another factor to keep in mind, when empty, these tubs generally weigh 300–750 pounds, but once filled with water and in use, the weight can climb to 2,000–3,500 pounds. 

Whether you’re looking for stress relief, comfort, or a space-saving spa solution, a small hot tub delivers big relaxation in a compact design.

A medium hot tub is one of the most popular choices for families and small groups because it offers the perfect balance of space and comfort. 

Typically designed to seat four to six people, this size provides enough room for everyone to relax without feeling crowded, making it great for both family time and social gatherings. 

In terms of dimensions, medium hot tubs generally measure between 6’6″ and 7’9″ in length, 6’4″ to 7’9″ in width, and 2’7″ to 3’2″ in height. 

Along with the size, the water capacity usually ranges from 300 to 500 gallons, which is manageable while still offering a full spa experience. 

When planning to install one, it’s important to consider the surrounding space as well. For a medium hot tub, you’ll want a room or outdoor area that’s at least 12 feet by 12 feet to allow for proper clearance, access, and maintenance. 

Altogether, a medium hot tub provides an excellent mix of comfort, functionality, and practicality.

Large hot tubs are a great choice if you love entertaining or have a big family. Designed to seat 6–8 or more people, these models typically measure between 7 and 9 feet in length and width, with a depth of about 3 to 3.5 feet (36–42 inches). 

Common options include the popular 8' x 8' size or larger models like 9' x 9', which offer plenty of room for group relaxation.

Depending on the shape, square or rectangular, dimensions may vary, but the focus is always on maximizing seating comfort. 

A large spa of this size usually holds between 550 and 800 gallons of water, so it’s important to plan for proper installation and maintenance. 

To safely fit a hot tub in your backyard or patio, leave at least 3 feet of clearance on all sides and 5 feet above for cover lifters or structures. 

Along with size, consider features, energy efficiency, and budget to find the perfect model for your needs.

Choosing the right hot tub shape depends on space, social use, and atmosphere. Square and rectangular tubs suit corners or larger spaces, round fosters intimacy, and unique shapes offer visual impact. 

Assess space, social habits, desired ambiance, and seating needs to select the most functional and fitting design.

A typical 6-person hot tub has a water depth of 32 to 38 inches, accommodating full-body immersion for most adults. Depth varies by seat and model, with taller users favoring deeper tubs, shorter users preferring shallower options, and overall height affecting comfort and installation requirements.

Not all 6-person hot tubs are built to the exact same size, since dimensions vary by brand, model, and design. On average, most fall within the medium-to-large size category, typically measuring about 7 to 8 feet in length, 6 to 7 feet in width, and 34 to 40 inches in depth. While compact and premium models share a similar footprint, luxury versions often use the space differently by adding lounge seats or more ergonomic layouts, giving each person a little more room without changing the external size much. Portable or inflatable hot tubs can also differ—they’re usually smaller and tighter for six adults compared to built-in acrylic models, which offer more comfort, durability, and advanced features. Across manufacturers, common sizes hover around 7' x 7' (84" x 84"), but larger models can stretch to 8' x 8' or even 8' x 9'. Because of these variations, it’s best to check the exact specifications of the model you’re interested in.

A 6-person hot tub typically weighs 800–1,500+ pounds empty and 4,500–8,000+ pounds filled with water and occupants. Weight varies by size, materials, and features, affecting installation, moving, and location choices. Reinforced flooring or concrete may be required for safe support.

A 6-person hot tub generally holds between 300 to 475 gallons of water, depending on the model, shape, and design. Larger and deeper tubs can hold more, while features like loungers, built-in steps, or footwells reduce the total volume since they take up space inside the tub. The shape also matters—rectangular models often hold more water than round or oval ones because of their efficient use of space. When filling your hot tub, it’s important to stop at the recommended water line, usually a few inches below the rim, to prevent overflow once people get in. Knowing the exact capacity isn’t just about filling—it helps you balance water chemicals properly, manage heating and maintenance costs, and ensure your deck or installation area can handle the full weight. If you’re unsure of your hot tub’s exact gallon capacity, always check the owner’s manual or the manufacturer’s website, or use an online hot tub gallon calculator for accuracy.

When planning a foundation for a 6-person hot tub, it’s important to consider both size and weight. A typical 6-person hot tub can weigh between 3,000 to 6,000 pounds when filled with water and people, with many models averaging around 5,400 pounds. This weight translates to about 100–150 pounds per square foot, so the slab must be strong enough to support the load. Most 6-person hot tubs measure between 7 to 9 feet in length and width, and about 3 feet in height, so your pad should at least match or slightly exceed these dimensions. Building codes usually require a concrete pad to be at least 4 inches thick, but experts often recommend 6 to 8 inches for larger hot tubs. Reinforcement with rebar or wire mesh is also advised, not only for strength but also for safety, as it should be properly grounded. Always confirm with a contractor or spa dealer to ensure your foundation is built to safely handle the specific hot tub you choose.

Yes, inflatable 6-person hot tubs vary in dimensions depending on shape, model, and manufacturer. Square tubs range from 73" to 94", round models up to 85" diameter, and hexagonal options differ. External and internal sizes can differ significantly, so measure installation space carefully.