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martinschneider/Number of hotels in the world

Created July 27, 2020 04:01
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Guesstimates
Raw
Number of hotels in the world
7.5 billion people
Let's assume that 10% of them are travelling = 750 million
Staying in hotels 10 nights per year
2.5 people per room
7.5 bn / 2.5 ~ 3 bn nights per year
On average, a hotel has 20 rooms
365 * 20 ~ 7500 stays
3 bn / 7500 = 400.000
Actual estimates: https://www.phocuswire.com/How-many-hotels-in-the-world-are-there-anyway-Booking-com-keeps-adding-them
Raw
Number of restaurants in Singapore
~6 million people
On average a person eats out 5 times a week
On average each visit lasts one hour
=> 30 milllion hours of eating out
On average a restaurant has capacity for 20 people
On average a restaurant is open 12 hrs a day, 7 days a week -> round down to 70 hrs a week
We probably underestimated the average capacity, so let's assume 100% utilisation
20 * 70 ~ 1500 customers per week
30.000.000/1500 = 20.000 restaurants
Actual number: 18,823 (https://www.tablebuilder.singstat.gov.sg/publicfacing/createDataTable.action?refId=14608)
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