Number of swimming pools in the UK
I would calculate with two categories: private pools and public pools.
Private pools
Population of the UK: 60 million
# of households: 20 million (assuming that an average household consists of 3 people)
Categorizing the households based on their income:
- very rich (5%): 1,000,000 households
- rich (10%): 2,000,000 households
- average (50%): 10,000,000 households
- poor (25%): 5,000,000 households
- very poor (10%): 2,000,000 households
Determining the average # of swimming pools in each category:
- very rich: 1,5 swimming pools / household (assuming that there are some households, which have indoor and outdoor swimming pools)
- rich: 0,8 swimming pools / household
- average: 0,4 swimming pools / household
- poor and very poor: no swimming pools
Consequently:
- very rich UK households: 1,500,000 swimming pools in total
- rich UK households: 1,600,000 swimming pools in total
- average UK households: 4,000,000 swimming pools in total
TOTAL number of private swimming pools in the UK: 1,500,000 + 1,600,000 + 400,000 = 7,100,000
Public pools
Population of the UK: 60 million
Ratio of people, who regularly go to swim: 40%
# of swimming pool visitors: 24 million
- Capacity of an average swimming pool: 8 lines
- Average opening hours: 10 hours / day
- Utility of an average swimming pool: 75%
TOTAL number of public swimming pools in the UK: 24,000,000 / 8 / 10 / 0.75 = 400,000
TOTAL number of swimming pools in the UK: 7,100,000 + 400,000 = 7,500,000
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