Hi, share your knowledge with the community!

How to estimate the number of visitors per year in the Eiffel tower?

Anonymous A

Hi could someone help me how to solve this problem?


  • Upvotes
  • Date ascending
  • Date descending
Andrea replied on 09/24/2017

Hi, hope it helps.

I will address the problem this way:

- N° of tourists daily * % of them visiting Tour Eiffel * 365

- N° of tourists daily = n° of incoming flights * % of tourists each flight * N° of passengers each flight * n° of airports

- N° of incoming flights daily = daily airport working hours * landing time

- N° of passengers each flight = 0,75 * full capacity (my assumption)

- % of tourists visiting Tour Eiffel in one day = 100% / avg vacation period

- landing time is about 20 min per flight

- daily airport working hours is 14H (from 7 am to midnight)

- THEREFORE N° of incoming flights daily = 14h * 60 min / 20 min = 42 incoming flights

- N° of airports = 3 (CDG, BEAU, ORL)

- N° of passengers each flight = 0,75 * 150 = 120 passengers

- % of tourists each flight = 50% (my assumption to make the count easier)

- THEREFORE, N° of tourists daily = 42 * 3 * 0,5 * 120 = 7560 (round to 7500)

- Avg vacation period = 4 days

- THEREFORE, % of tourists visiting Tour Eiffel in one day = 100 / 4 = 25%

- FINALLY, N° VISITORS PER YEAR TOUR EIFFEL = 360 (easy to calculate) * 0,25 * 7500 = 675.000

I welcome any comment, suggestion and fruitful critic.


Omar replied on 09/24/2017

I'd start by figuring the number of access points to Eiffel tower, I think you have three elevators and a stairs.

After that, I'd divide the year in peak days and non-peak days. Peak days will be the months of April through September and the rest are non- peak.

I would figure out the operating hours of the tower, i assume from about 9 AM till 12 AM. I would estimate the number of round trips each lift does during an hour (60 minutes divided by the duration of the lift's trip in minutes). Would then estimate the capacity of the lift, and during peak days, i think it is fair to assume almost full capacity throughout the day.

So i'd get the number of visitors for every lift trip and multiply it by the number of trips per day to get the number of visitors per lift per day. I would then ,multiply this by the number of days per year and then multiply it by 3 because we have three lifts.

For non-peak day i'd assume hald the amount of visitors as a quick rough estimation.

When it comes to the stairs, i would estimate the number of visitors that enter the stairs per minute ( probably 4 individuals per minute during peak times). I would follow the same approach as above to get the total per peak days. I would also divide this number by 2 for non-peak times.

Related BootCamp article(s)

Important Facts

It's essential to know some key figures regarding geographies, population, economies for your case interviews. We summarized them for you here.

9 Comment(s)

Market Sizing

Market Sizing Cases are used to test your quantitative and reasoning skills. The interviewer evaluates your structure, numbers-handling and business sense.

12 Comment(s)

Related case(s)

Oliver Wyman case: Full Electrons Ahead

Solved 12.0k times
4.8 5 3051
| Rating: (4.8 / 5.0)

Your client, large automotive OEM WyCar, has developed its first fully electric vehicle (EV) and introduced it as a pilot on the Austrian market last year. However, sales have been far below the expected numbers. The management has engaged you to support them in understanding the reasons and advise ... Open whole case


Solved 25.0k times
4.5 5 724
| Rating: (4.5 / 5.0) |

Nutripremium is a very well-known premium nutrition food company in Europe (€1 billion revenue last year). It is based in Spain and has an excellent market share not only in its home country but also in Portugal, France, Italy and Germany. Nutripremium has two main lines of products: Vitam ... Open whole case

Children vaccine

Solved 23.9k times
4.4 5 660
| Rating: (4.4 / 5.0) |

Beyer, one of the biggest pharmaceutical companies in the world, just invented a very reliable vaccine against Chickenpox, a disease that affects children in the age from 2 to 16 years. Beyer came to you wondering what their potential sales in Europe in the first year would be if they launched th ... Open whole case

Gas station

Solved 17.5k times
4.4 5 329
| Rating: (4.4 / 5.0) |

How many gas stations are there in Paris? Suppose a friend of yours wants to open a gas station in Paris. What aspects should he consider? Open whole case


Solved 11.0k times
4.5 5 340
| Rating: (4.5 / 5.0) |

Your client, Fairway, is a manufacturer and supplier of golf balls. The company is acting globally in almost every market. They are now planning to expand to Portugal, but they do not have any information about the market there. Portugal is a small country in West Europe with a population o ... Open whole case