Sauna Capacity Calculator: How Many People Fit in a Sauna?

Enter your sauna's internal dimensions and how the benches are arranged, and we'll work out how many adults it seats, how many can lie down, and how much bench length you actually have. Two planning figures do most of the work: allow about 60cm of bench per seated adult and roughly 190cm along a wall for anyone who wants to lie down. A room can look big on paper yet seat far fewer people than you'd think once you account for corners and the door.

These figures assume a single tier of benches. Fitting a second, lower tier along the same walls, which most saunas over about 190cm tall can take, gives you extra perching and foot room and can lift the seated headcount for a full house. Remember the top bench is the hottest seat, so that is where most people gravitate.