Measure before you choose

Hot tub dimensions: sizes, footprints and space to allow

Hot tub sizes are quoted in several ways: inside diameter, outside diameter, length and width, and water volume. This guide explains each one and how much garden space a tub really needs.

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Elevated view of a round timber-clad hot tub with a pale liner, access steps, metal flue and folded cover beside it

From our customers

These products at our customers’ homes

Customer projects matched to the products listed on this page. Earlier specifications and selected options may differ.

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Customer projects from United Kingdom.

J. — Bickerton, Cheshire, United Kingdom

TimberIN Nordic™ External Comfort

Efficient delivery time and details provided along the way. Delivery driver was helpful. Luckily we have access to a telehandler which helped with unloading the pallets! We were kept informed through the build process an…

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Efficient delivery time and details provided along the way. Delivery driver was helpful. Luckily we have access to a telehandler which helped with unloading the pallets! We were kept informed through the build process and once setup the hot-tub has been excellent. Really like the wifi connection feature and cover locking mechanism.

Review and installation photos →

Charles — London, United Kingdom

TimberIN Nordic™ Deluxe

Hi, you can see the hot tub in these pics at our retreat.

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Ray — Newport, United Kingdom

TimberIN Nordic Core™

Hi Albertas, as promised, I’ve attached some photos of our Hot Tub. We’re not on Facebook or the other social media platforms, but we’re happy for you to use any you might want for your website. It arrived Friday morning…

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Hi Albertas, as promised, I’ve attached some photos of our Hot Tub. We’re not on Facebook or the other social media platforms, but we’re happy for you to use any you might want for your website. It arrived Friday morning 4th April and we were in the water and enjoying it on Saturday evening. We’ve been in it every night since! A big thank you to you and your team. The specification is exactly as planned, and the workmanship is excellent. You might welcome some feedback on a couple of relatively minor issues, which I hope you will find helpful. We only received 4 pictures of the hot tub, but in all honesty, these weren’t really enough for us to confirm that we would be happy with the product before making the final payment. We trusted the process and made payment, but it would have been better if we could have seen images of the liner and also inside the electric cupboard and the insulation. Just something to be aware of. The other minor point relates to the sand filter and UV-C. both of them came with European plug fittings that required changing. I would have thought that a UK specification would come with a UK plug. Again, this is not a huge point, but it was inconvenient to have to change these. Apart from those minor niggles, everything was great. So, once again, a big thank you to you and your team. Best of luck and continued success in the future.

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Current hot tubs and their sizes

Every product page lists the available diameters or lengths with seating. The card shows the model’s starting price, which is normally for its smallest size.

How to read hot tub dimensions

Inside diameter or length is the bathing space and sets how many people sit comfortably.
Outside diameter or length includes the cladding and is what must fit your base, gate and route.
Overall footprint adds the heater, steps and chimney. An external stove sits beside the tub and needs its own space.
Water volume in litres tells you how long the tub takes to fill and heat, and how much treatment the water needs.

Typical hot tub sizes in our range

Examples from the current UK range, taken from the product pages. Check the product page for the exact size you select.

Example hot tub dimensions
Model and size	People	Dimensions	Water
Nordic Duo Wood / Oval Duo	1–2	about 1,400 × 900 mm	about 1,000 L
Nordic Duo	1–2	about 1,900 × 1,190 mm	about 1,000 L
Nordic Flex, 1,400 size	2–3	1,400 mm inside	about 1,380 L
Nordic Flex, 1,600 size	3–4	1,600 mm inside	about 1,800 L
Nordic Square, 1,400 size	3–4	about 1,700 mm outside	see product page
Nordic Compact Snorkel	3–4	1,550 mm inside / 1,770 mm outside	about 1,200 L
Snorkel Compact	4–6	1,800 mm inside / 2,000 mm outside	see product page
Round wooden and lined tubs (e.g. Core, Deluxe)	by size	1,600, 1,800, 2,000 or 2,200 mm sizes	see product page

How much space to allow around a hot tub

Plan the base larger than the tub. Allow room for the steps on the entry side, a clear zone around a wood-fired chimney and stove, and space to fold or lift the cover. Leave access to the drain and any equipment box for maintenance. On a 4 person or 6 person tub, a paved or decked area a little wider than the outside diameter on every side is a sensible starting point, plus the heater footprint if external.

Then check the route. Measure the narrowest gate, passage and turn between the road and the base, and the height under any overhead cable. A round tub usually travels on its side, so the narrowest point must clear the outside diameter or the tub height, whichever applies. Our base guide explains suitable foundations.

Choosing the right size

Start with how many people use the tub most weeks, not the maximum at a party. Couples and small gardens suit a 2 person hot tub or one of the small hot tubs; families usually look at 4 person or 6 person sizes; groups should see large hot tubs. All models are on the outdoor hot tubs page.

Hot tub dimension questions

What are the dimensions of a 4 person hot tub?

In our range, compact 3–4 person tubs include the Nordic Compact Snorkel (1,550 mm inside, 1,770 mm outside), the 1,600 mm Nordic Flex and the 1,400 mm Nordic Square at about 1,700 mm outside. The heater and steps add to the footprint.

What are the dimensions of a 6 person hot tub?

The Snorkel Compact for four to six people is 1,800 mm inside and 2,000 mm outside. Round models also come in 2,000 and 2,200 mm sizes for more room; check seating on each product page.

Should I measure inside or outside diameter?

Both. The inside diameter tells you about seating, the outside diameter tells you whether it fits the base and access route.

How much water does a hot tub hold?

Our two-seaters hold about 1,000 litres and compact 3–4 person tubs about 1,200–1,800 litres; larger tubs hold more. The product page gives the figure for each size.