2QUESTION 2 OF 3
Answer & explanation
Counting private saunas in homes, summer houses and apartment blocks, as well as public ones.
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
300,000
saunas
How to estimate it
Fermi’s official “Napkin math”
The easiest place to start is Swedish households, about 4.5 million of them. A sauna there is a fixture rather than a luxury: in houses, in summer cabins, in the basement of an apartment block. How many households have one? Call it 1 in 15.
- Swedish households
- 4,500,000
- Share with a sauna
- × 1/15
- 4.5M ÷ 15
- ≈ 300,000
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Public saunas
- ≈ 4,000
- Private saunas (homes, summer houses, apartment blocks)
- ≈ 300,000
- Cited estimate (public + private)
- ≈ 300,000
- Sweden population
- ≈ 10.5 million
- Ratio
- ≈ 1 sauna per 35 people
Reference cited by Fermi: Swedish sauna industry estimates
How close was your guess?
Your comparison will appear here.
Compare by ratio: divide the larger number by the smaller one. The closer to 1×, the better.