All you need to know about Spa and Hot Tub sizes

17 October, 2022

Hot tubs and spas come in many different sizes ranging from small spas that are perfect for two, through to extra large spas that fit upwards of 7 people! So which hot tub is right for you? To help you answer this question, we will run you through the difference between small, medium, and large spas. What the typical dimensions are for each spa size, as well as how much a typical hot tub weighs.

Spa Pools

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Discover the perfect spa pool to fit your lifestyle and provide you and your family with relaxation and rejuvenation every day. 

We hope you enjoy choosing from our range of exceptional spas with a size, seating arrangement and massage therapy to suit every 'body'.


What is a spa pool?

A spa pool, also known as a hot tub or pool spa, is a specially designed structure that holds warm water. A spa pool combines the therapeutic benefits of warm water with powerful jets that provide massaging and soothing effects to the body. Spa pools offer a range of features, such as adjustable jets, seating options, lighting, and temperature control, allowing users to customise their spa pool experience. Whether for relaxation, stress relief, or socialising, spa pools provide a tranquil and luxurious retreat right in the comfort of your backyard.

FOCUS ON myTemptation : offering modern design concepts that push us ahead of the competition

myTemptation is an excellent choice for those who require a larger spa and the flexibility of a multi person model. With easy steps and smooth movement into position, it provides seamless operation while providing soothing neck and shoulder massage that relaxes the muscles in your back and eases away tension.

Standard Hot Tub Sizes

When choosing the right spa, you will generally come across sizes like ‘small’, ‘medium’, and ‘large’. But that can be confusing if you are unfamiliar with typical spa sizes. We will explain what these sizes mean to help you navigate the size charts.


Small Hot Tubs (2-4 People)

A small hot tub fits between 2 and 4 people. This means that a small hot tub will be around 1.6m x 2m with a height of 0.8m. This is perfect for people with small families who want somewhere to relax with their closest friends. Sapphire Spas Compact Range is ideal for 2-4 users.


Medium hot Tub (4-6 People)

The Medium hot tub size is the mid-size range that accommodates between 4 and 6 people. For Sapphire Spas, you need to look in the Family Range of spas. At approximately 2m square, the family range easily fits 5 people. It has multiple seat configurations to ensure every family member has a seat that is just the right size. Regardless of whether you are 6ft and need a recliner or the youngest in the family and need a higher seat, the family range will have something for you.


Large Hot Tub (7+ People)

Typically, the largest hot tub size you will encounter is designed for 7 or more people. These hot tubs start at 2.2m square and get gradually get bigger. The largest spa Sapphire Spas offers seats 10 people and can be found in the Entertain Range.

Standard hot tub SIZES

Hot Tub Dimensions 2 person

Now that you know the general size you might be looking for choosing a swim spa, we can get into the specific dimensions of each hot tub. Starting with a spa built for two, the mySpace 2 person spa is excellent if you have limited space. The spa is a corner style unit and comes in at only 1640 x 1640 x 2050 x 875mm and holds only 510 litres.


Hot Tub Dimensions 4 Person

The MyEscape hot tub in Sapphire Spas compact range is perfect for 4 people. This spa measures 1950 x 1950 x 830mm and uses 1100 litres of water. It is the ideal size to seat 4 people comfortably. However, because this spa is designed to seat 5, there is always room for one more!


5 Person Hot Tub Dimensions

You can get a spa built for 5 people with dimensions as small as 1950 x 1950 x 830. MyOasis is a spa that is built for comfort. With 32 powerful hydrotherapy massage jets, this 5 person hot tub is ideal for small gatherings of friends and family alike.


Hot Tub Dimensions 6 Person

If you are looking for a 6 person spa, you will need to shop at the larger size of our mid size categories. The myDream 6 person spa measures 2100 x 2100 x 890, offering a bit of extra leg room, as well as additional depth.


7 Person Hot Tub Dimensions

You can still get a spa from our luxurious range if you want a 7 person hot tub!  The myRecovery spa comes with 43 jets (64 if you purchase the premium edition) and requires 3 pumps and 2 hydro jet boosts pumps to give you the maximum comfort level.

Measuring 2300 x 2300 x 880 and requiring 1380 litres of water, you’ll never want to leave the bliss of this luxury spa.


Hot Tub Dimensions 8 Person

If you want to host 8 or more people, you will need to shop our Entertain range. With our smallest 8 person spa measuring 2265 x 2265 x 850, the myFriends spa requires a bit of extra space to set up correctly. However, if you buy a spa that fits your entire friend group, you’ll be the envy of all your mates.

Cost to Operate a Hot Tub

How much your spa costs to run depends on the model you own, water temperature, how long you keep the jets on, insulation around the spa, the ambient temperature around the spa etc. For tips and tricks on keeping running costs down, look at Sapphire Spas' article Spa Pool Running Costs.


Hot Tub Weight


The weight of a hot tub depends on several things: what size the hot tub is, whether it has water, and how many people are in it. These things must be considered when deciding where to place your brand-new spa.

We've compiled a list of some of our most popular spas from our range of spa pools to give you an idea of what a spa can weigh when empty and when they are full.


Hot Tub Pad Size

A hot tub pad is a foundation you place under your new spa. It ensures that your spa is safe for use, prevents damage from sinking and warping and ensures that your warranty is not voided due to inadequate support structures. The exact foundation you need will vary depending on the size of the hot tub you purchase. You can find the size of for your specific spa on our website.

Spa pads can be either a concrete slab, paving or a timber deck. Just remember to ensure that there is 600mm clearance around your entire spa. We also strongly recommend using licensed professionals when installing your spa foundation.