How many 18.6 oz (527 g) family-size boxes of Lucky Charms would it take to have one marshmallow for every person in the Republic of Ireland?

1QUESTION 1 OF 3

Answer & explanation

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

Illustration for: How many 18.6 oz (527 g) family-size boxes of Lucky Charms would it take to have one marshmallow for every person in the Republic of Ireland?

Answer & explanation

Official answer

13,000

boxes

How to estimate it

Fermi’s official “Napkin math”

Start with Ireland, about 5 million people. How many marshmallows are in one box? Pour a bowl and you might get 30, and a family box makes about 12 bowls.

Ireland's population: ≈ 5,000,000
Marshmallows per box: 30 a bowl × 12 bowls: ≈ 360
5M ÷ 360: ≈ 14,000 boxes

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

Source calculation & reference

Republic of Ireland population (CSO, April 2026): 5,525,600
Marshmallows in an 18.6 oz family box (six-box count, 2024): ≈ 430
5,525,600 ÷ 430: ≈ 13,000 boxes

Reference cited by Fermi: CSO April 2026 estimate: 5.53M people · 2024 six-box count: about 430 marshmallows per box

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Your estimate in boxes

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