All Fermi answers
Fermi #6 · Question 1

How tall is the 22nd tallest building in the world?

Explore the official answer and the simple reasoning behind this Fermi estimate.

1QUESTION 1 OF 3

Answer & explanation

The official answer, with Fermi’s reasoning step by step.

Answer & explanation

Official answer

1,483

feet

How to estimate it

Fermi’s official “Napkin math”

Start with the Burj Khalifa, the tallest there is, about 2,700 feet. The top of that list falls off fast, so how much shorter is 22nd place? Call it half.

Burj Khalifa
≈ 2,700 ft
22nd place, about half
× 0.5
2,700 ÷ 2
≈ 1,350 ft

Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.

Source calculation & reference
Top 22 floor on CTBUH list
~452 m
Convert m → ft
× 3.28
452 × 3.28
≈ 1,483 ft

Reference cited by Fermi: CTBUH Skyscraper Database

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