What size sauna do I need?
The occupancy number on the box assumes everyone sits upright, shoulder to shoulder, and nobody wants to lie down. Measure instead.
Start with the interior, not the label
A “2-person” sauna is a manufacturer's marketing decision, not a standard. The numbers that determine whether it is comfortable:
- Bench width per person. 20 inches is tight, 24 inches is comfortable, 30 inches is generous. Multiply by the number of people who will realistically be in there at once.
- Bench depth. Under 16 inches and you perch. 18 to 20 inches lets you sit back against the wall. Over 24 inches and a shorter person can lie down.
- Interior height. 72 inches is a low ceiling for a standing adult. 76 to 80 inches is normal. In a traditional sauna, ceiling height also affects how the heat stratifies.
Practical sizing by household
| Who uses it | Buy this size | Typical exterior footprint |
|---|---|---|
| One person, always alone | 1-person | ~36″ × 36″ |
| One person, occasionally two | 2-person | ~48″ × 42″ |
| Couple, both regularly | 2 to 3-person | ~53″ × 45″ |
| Family of three or four | 4-person | ~63″ × 48″ |
| Entertaining, or you want to lie down | 4 to 6-person | ~72″ × 60″ and up |
Buying one size up is the most common piece of advice, and it is usually right — but only if you also have the electrical capacity and the delivery path. A 4-person cabin you cannot power or cannot get through the door is worse than a 2-person one you use daily.
Room clearances
Around the cabin you need:
- 4 to 6 inches at the back and sides for ventilation and wiring access
- Full door swing — most sauna doors open outward, by fire-safety convention
- Access to the control panel, usually on an exterior wall
- A level floor. Carpet is generally acceptable for infrared cabins; check the manual.
So a cabin with a 48-inch exterior width wants roughly 56 inches of wall, plus room to open the door.
Measure the delivery path before you order, not after. Panels arrive flat, but the largest single panel is usually close to the cabin's full height and width. Measure your narrowest doorway, the turn at the top of the stairs, and the stairwell headroom. This is the single most common reason a sauna ends up in a garage instead of a basement.
Outdoor sizing
Outdoor units add a foundation. Your pad or deck should extend at least 6 inches beyond the cabin footprint on every side, be level to within about a quarter inch across its length, and drain away from the structure. Add the space you need to walk around it for maintenance.
Next steps
- 1-person saunas
- 2-person saunas
- 3-person saunas
- 4-person saunas
- Check the electrical requirement for that size
Not sure? Send us your room dimensions and we will tell you what fits, including when the answer is nothing.