What Size Hot Tub Do I Need?
Share
Choose a hot tub by the number of people who will soak at the same time, then add a seat or two for guests: a 4-person tub suits a couple or small family, a 5 to 6 person tub suits most households that entertain, and a 7-person tub suits larger groups. Then check that your space, base and power can handle the tub you pick. To compare specific models, see our guide to the best hot tubs for home.
Our hot tubs for sale run from 4 to 7 seats, and every listing shows the footprint, filled weight and power requirement. This guide walks through how to match size to your household and your yard. It is planning help for home setups.
How many seats do you really need?
One consumer sizing guide groups tubs into small (2 to 4 people), medium (5 to 6 people) and large (7 or more), and notes that most buyers choose a model seating four to six, in its hot tub size guide. Use the number of people who soak together on a normal weekend, not the biggest party you can imagine, because a bigger tub costs more to buy, heat and fill.
- Just you and a partner: a 4-person tub leaves room to stretch out.
- A family of four or regular guests: a 5 to 6 person tub gives everyone a seat.
- Frequent group soaks: a 7-person tub, if the space and power allow.
Seat counts are a guide, not a promise. Deep seats, loungers and captain's chairs take more room than bench seats, so look at the seating description as well as the number.
What do the sizes look like on a real lineup?
These figures come from the product page for each Liberty Spas model we carry:
| Model | Seats | Footprint (L x W x H) | Water | Filled weight | Power |
|---|---|---|---|---|---|
| LYS4000 | 4 | 84" x 60" x 29" | 193 gal | 2,050 lb | 120V, 15A (field-convertible to 240V) |
| LYS4500 | Up to 6 | 78" x 78" x 29" | about 235 gal | 2,850 lb | 120V, 15A |
| LYS5000 | 6 | 79" x 79" x 35" | 264 gal | 3,280 lb | 240V, 50A |
| LYS6000 | 6 | 84" x 84" x 35" | 290 gal | 3,280 lb | 240V, 50A |
| LYS7000 | 7 | 84" x 84" x 35" | 317 gal | 3,500 lb | 240V, 50A |
Prices change, so check the current price on each product page. Shop Pay Installments may be offered at checkout for eligible orders.
What is the best 4-person hot tub?
For four people, the LYS4000 is the tub in our lineup built for the job. Its 84" x 60" footprint seats four, including a double lounger with two depths, and it runs on a standard 120V, 15A dedicated outlet on a GFCI-protected circuit. It also has 20 jets and Bluetooth speakers. If you want more heating power later, it can be field-converted to 240V, and a licensed electrician should do that conversion.
What is the best 6 person hot tub?
It depends on what you want to prioritize. Our 6-seat options differ mainly in power and jets:
- LYS4500: a 5 to 6 person tub with 18 jets that plugs into a 120V, 15A dedicated GFCI outlet. It is the pick if you want to avoid new 240V wiring.
- LYS5000: 6 seats, 34 jets, a 5 HP pump and a 5.5 kW heater on a dedicated 240V, 50A circuit.
- LYS6000: 6 seats, 46 jets, two 5 HP pumps, a full-length lounger and a footwell, on the same 240V, 50A circuit.
Our guide to plug and play hot tubs, 120V vs 240V explains how the power type changes heating and jets.
How much does a 6 person hot tub weigh with water?
On our listings, a 6-person hot tub weighs 3,280 lb filled for both the LYS5000 and the LYS6000, and 2,850 lb for the 5 to 6 person LYS4500. Dry weights are 850 lb for the LYS5000 and LYS6000 and 640 lb for the LYS4500. Weight matters for the base: Liberty Spas recommends a flat, level base that supports at least 150 lb per square foot, such as a 4 to 6 inch poured concrete pad. Do not place a filled tub on a deck without a structural check.
How much space do you need around the tub?
The footprint is only part of the picture. The size guide above suggests leaving 12 to 36 inches of clearance on each side and enough room to open and store the cover. Add the path from the delivery point to the pad, since our tubs ship curbside and you plan the move from the curb or driveway to the pad. Measure gates, steps and overhead branches before you order. Check local rules and your electrician's advice for how close a tub can sit to your house and to power lines.
Does a bigger tub cost more to run?
Usually, yes. It holds more water to heat and treat. The LYS4000 holds 193 gal and the LYS7000 holds 317 gal on their product pages. One home-cost guide puts the average cost to run a hot tub at about $700 a year, in its hot tub running cost breakdown, and a larger tub in a cold climate will sit above that. See our full budget in how much does a hot tub cost, and what to expect from ownership in what is the downside of owning a hot tub.
Which size should you pick?
- Small patio, two to four people, simple power: LYS4000.
- Up to six people without a new circuit: LYS4500.
- Six people and more jets: LYS5000 or LYS6000.
- Seven seats for a group: LYS7000.
If you are between two sizes, choose the smaller one that fits your usual group. It costs less to heat, needs a smaller pad and is easier to place. Our hot tub buyer checklist helps you compare listings before you decide.
Hot tubs are for relaxation and comfort. If you have a heart condition, are pregnant or take medication, ask your doctor before soaking.
What is the best small hot tub for a small backyard?
The Liberty Spas LYS4000 is the most compact we carry, at 84 x 60 x 29 inches. It seats four with a double lounger, holds about 193 gallons and runs on a standard 120V outlet. If you need up to six seats, the LYS4500 fits in a 78 x 78 inch square.
Measure the whole zone, not just the tub: a common guideline is 12 to 36 inches of clearance on each side plus room for the cover to open. Add 12 inches per side and the LYS4000 needs about 108 x 84 inches, and the LYS4500 about 102 x 102 inches. Both start on a dedicated 120V, 15A GFCI-protected outlet, and Liberty Spas recommends a flat, level base that supports at least 150 lb per square foot, such as a 4 to 6 inch concrete pad. See the LYS4000 and LYS4500, and compare 120V versus 240V before you pick.
Related reading: Can You Turn a Hot Tub Into a Cold Plunge? · Liberty Spas LYS6000 vs LYS7000: Which 46-Jet Hot Tub?
Frequently asked questions
How many people fit in a 4-person hot tub?
Four adults, according to the seat count. The LYS4000 seats four, including a double lounger with two depths.
What is the most popular hot tub size?
One consumer sizing guide says most people choose a model seating four to six.
How big is a 6 person hot tub?
On our listings, the 6-person LYS5000 is 79" x 79" x 35" and the LYS6000 is 84" x 84" x 35".
How much does a 6 person hot tub weigh with water?
3,280 lb filled for the LYS5000 and LYS6000, with the 5 to 6 person LYS4500 at 2,850 lb filled, per their product pages.
How much space do I need around a hot tub?
One size guide suggests 12 to 36 inches of clearance on each side, plus room to open and store the cover. Plan the delivery path too.
Is a bigger hot tub always better?
No. A bigger tub costs more to buy, heat and fill, and needs a larger pad. Pick the smallest tub that seats your usual group.
What is the best small hot tub for a small backyard?
The Liberty Spas LYS4000 is our most compact at 84 x 60 x 29 inches, seats four and runs on a 120V outlet. The LYS4500 seats up to six in a 78 x 78 inch footprint.
Written by Logan McClure, founder of Restore Suite. Every guide is researched using peer-reviewed studies, recognized medical sources, and manufacturer specifications. This article is educational and is not medical advice. Learn about our editorial standards or contact our team.
Ready to compare? See every Liberty Spas hot tub, from the LYS4000 to the LYS7000.
