Hot tub sizes and dimensions

Short answer

A typical 6-person hot tub is about 7 ft x 7 ft (84 x 84 in, 37 in tall) and holds 392 gallons, the middle of 141 six-seat spec sheets. Two-seaters run about 76 x 64 in; eight-seaters about 94 x 92.5 in.

Updated October 2026By the HotTubFinder research desk

Typical 2-, 4-, 6- and 8-seat hot tubs drawn to scale next to a person and a door, from 6 ft 4 in x 5 ft 1 in to 7 ft 10 in x 7 ft 9 in — Hot tubs from 2 to 8 seats, drawn to scale next to a person and a door.

How big a hot tub is, by the number of seats

1 to 2 seats	6 ft 4 in x 5 ft 1 in76 x 61 in	160 gal	1,858 lb
3 seats	6 ft 11 in x 5 ft 5 in83 x 65 in	219 gal	2,500 lb
4 seats	6 ft 7 in x 6 ft 1 in78.5 x 73 in	240 gal	3,020 lb
5 seats	6 ft 11 in x 6 ft 10 in83 x 82 in	306 gal	3,751 lb
6 seats	7 ft x 7 ft84 x 84 in	392 gal	4,340 lb
7 seats	7 ft 5 in x 7 ft 5 in89 x 89 in	395 gal	4,621 lb
8 seats	7 ft 10 in x 7 ft 9 in94 x 92.5 in	490 gal	5,860 lb
9 seats	8 ft 5 in x 7 ft 9 in101 x 92.5 in	518 gal	6,089 lb
10 to 11 seats	10 ft 1 in x 7 ft 10 in120.5 x 93.5 in	733 gal	8,335 lb

The middle tub of each size from 386 spec sheets. Weight full is the maker's figure: most count the tub and its water, some add people.

How big is a hot tub for 6 people?

About 7 ft x 7 ft: the median six-seater is 84 x 84 x 37 in and holds 392 gallons. Six seats is the most common size we track, with 141 of 386 models. Full of water it weighs about 4,340 lb, so the base matters as much as the footprint: see what to put a hot tub on.

What size hot tub do I need?

Count the people who will use it on a normal night, then check the footprint. Between five and seven seats the shell grows less than you might think: the medians are 83 x 82 in for five, 84 x 84 in for six and 89 x 89 in for seven. For two people, see 2-person hot tubs; for a family of four, 4-person hot tubs; for big groups, 8-person hot tubs.

Lounger or open seating?

Top view of two same-size 89 in hot tubs with people to scale: one with a lounger seats 6, one with open seating seats 7; side views show lying back versus sitting upright

A LoungerA full-length reclined seat you lie back in with your legs out. It uses room inside the same shell rather than making the tub bigger.In the glossary is a full-length reclined seat you lie back in. It does not make the shell longer: six- and seven-seaters with one have a median length of 86 in, and those without 85 in. It uses room inside the same box that upright seats would otherwise take. Open seatingA layout of upright seats all the way around, with no lounger, so more people fit in the same size tub.In the glossary puts upright seats all the way around.

At the showroom, lie in the lounger: check that your feet reach the end and your shoulders stay under water. Tubs that have one are on hot tubs with a lounger.

How tall is a hot tub?

The median cabinet is 36 in tall, from 29 to 42 in, measured from the ground to the top of the cabinet before the cover. Makers don't publish water or seat depth, so sit in the deepest and shallowest seats at the showroom to feel the difference.

The details

Every size's range, the smallest and largest tubs, gallons and where the numbers come from.

Shortest and longest of each size

386 spec sheets

Hot tub sizes by seat count: median of 386 spec sheets, with the shortest and longest

1 to 2 seats	76 x 61 x 30 in	1614 list gallons	64 inCaldera Spas Aventine	86 inAmerican Whirlpool 101
3 seats	83 x 65 x 32.5 in	4538 list gallons	63 inWellis Teide Life Deluxe	85 inMarquis Spirit
4 seats	78.5 x 73 x 33.5 in	26	67 inBullfrog Spas STIL5	92 inVita Spa Salon
5 seats	83 x 82 x 36 in	6760 list gallons	74 inSundance Spas Montclair	100 inHot Spring Envoy
6 seats	84 x 84 x 37 in	141136 list gallons	78 inBullfrog Spas Calm6	130 inCal Spas Newporter X-Series EC-1148LX
7 seats	89 x 89 x 36 in	6864 list gallons	78 inMaster Spas S6	110 inHot Spring Prism
8 seats	94 x 92.5 x 38 in	1311 list gallons	88 inBullfrog Spas A7	133 inAmerican Whirlpool 982
9 seats	101 x 92.5 x 37.5 in	8	91 inArtesian Spas Isla Margarita	140 inWellis Olympus Life
10 to 11 seats	120.5 x 93.5 x 38.5 in	2	110 inBullfrog Spas M9	131 inCal Spas El Grande X-Series EC-1166EX

Each dimension is the median on its own, so a row describes a typical tub, not one model. Shortest and longest link to the maker's spec sheet. When a maker publishes a range (5 to 6 seats, 29 models do), we count the lower figure.

The smallest and largest hot tubs

By footprint, the smallest is the Cal Spas Aloha PZ-614L at 78 x 34 in, and the largest is the Wellis Olympus Life at 140 x 91 in.

The five smallest and five largest hot tubs by footprint

Aloha PZ-614LCal Spas · among the smallest	1	78 in	34 in	29 in	—
Bella MSNordic Hot Tubs · among the smallest	2	83 in	34 in	38.5 in	135
AzaleaArtesian Spas · among the smallest	2	76 in	46 in	32 in	170
AspireCaldera Spas · among the smallest	2	72 in	53 in	29 in	125
MiniHot Spring · among the smallest	2	72 in	53 in	29 in	125
Olympus LifeWellis · among the largest	9	140 in	91 in	38 in	616
El Grande X-Series EC-1166EXCal Spas · among the largest	11	131 in	93 in	39 in	900
982American Whirlpool · among the largest	8 to 9	133 in	91 in	38 in	714
Newporter X-Series EC-1148LXCal Spas · among the largest	6	130 in	93 in	39 in	800
BiminiArtesian Spas · among the largest	9	132 in	91 in	36 in	683

How many gallons does a hot tub hold?

A median of 345 gallons across the 363 spec sheets that publish it, from 125 gallons in the smallest two-seaters to 900 in the largest. Two-seaters hold a median 160, six-seaters 392 and eight-seaters 490. Every gallon is water you heat after each refill; what keeping it hot costs is on hot tub running cost.

How big is a swim spa by comparison?

Swim spas are built for length. The 186 we track run from 92.5 to 257 in long, a median of 187.6 in (15 ft 8 in), against 84 in for the median hot tub. Lengths, swim areas and depths are on swim spa sizes.

Where these numbers come from

Every figure is read from the maker's published spec sheet or product page. The dot after a number links to the document it came from. Medians are ours, computed from those figures for the 386 of 390 models that publish a seat count.

Common questions

What is the most common hot tub size?

84 x 84 in, or 7 x 7 ft. 79 of the 379 spec sheets that give both length and width list exactly that footprint, and it is the median for six seats.

How deep is a hot tub?

Spec sheets publish the overall height of the cabinet, a median 36 in across 386 models, from 29 to 42 in. No maker in our data publishes water or seat depth, so we don't list it.