All Fermi answers
Fermi #11 · Question 1

How many people have ever summited Mount Everest?

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

7,563

climbers

How to estimate it

Fermi’s official “Napkin math”

The first summit was back in 1953, about 70 years ago. Hardly anyone made it in the early decades, but lately it's hundreds a year. Average across all of it, maybe 100 a year.

Years since 1953
~70
Summited per year
× 100
70 × 100
≈ 7,000

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

Source calculation & reference
First ascent
1953 (Hillary & Norgay)
Total summit ascents
~13,700
Unique individuals (multi-summits removed)
7,563

Reference cited by Fermi: The Himalayan Database (Dec 2025)

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