All Fermi answers
Fermi #106 · Question 3

When the 2026 FIFA World Cup kicked off, what was the combined age of every player in every squad?

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

3QUESTION 3 OF 3

Answer & explanation

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

Answer & explanation

Official answer

34,300

years

How to estimate it

Fermi’s official “Napkin math”

You need to estimate the number of teams, players per team, and average age of a World Cup player, unless you know one offhand. There are a lot of teams but not every country gets to send one, since they have to qualify. You could guess around 50. Then there are 11 players on the field at a time, so with subs, there are probably 22~ players per team. Squads have some young guys and some old vets, so the average age is maybe somewhere in the late 20s, like 28. Now we can just do some quick math.

~50 teams × ~22 players
≈ 1,100
Average age
× 28
1,100 × 28
≈ 30,800

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

Source calculation & reference
Players in the 48 final squads
1,248
Average age at kickoff, June 11, 2026
× 27.45
1,248 × 27.45
≈ 34,300

Reference cited by Fermi: FIFA squad lists, via RotoWire

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