All Fermi answers
Fermi #111 · Question 1

How many original Game Boy screens' worth of pixels would it take to fill one 4K TV screen?

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

1QUESTION 1 OF 3

Answer & explanation

The 1989 Game Boy against a standard 4K UHD television.

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

The original Nintendo Game Boy

The original Nintendo Game Boy

An original grey Nintendo Game Boy on a green cutting mat, its small green-tinted screen showing a paused game above the D-pad and the red A and B buttons

Illustration from Fermi.gg

Answer & explanation

Official answer

360

Game Boy screens

How to estimate it

Fermi’s official “Napkin math”

How many pixels does a 4k TV have? About 4,000 pixels across and 2,000 down, which is 8 million. How sharp was a Game Boy? Very "pixelated" maybe 150 pixels each way, so call it 20,000.

4K TV, 4,000 × 2,000
≈ 8,000,000
Game Boy, 150 × 150
≈ 20,000
8M ÷ 20,000
≈ 400

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

Source calculation & reference
4K TV, 3,840 × 2,160
8,294,400 pixels
Game Boy, 160 × 144
23,040 pixels
24 across × 15 down
= 360

Reference cited by Fermi: Nintendo Game Boy specs · ITU-R BT.2020

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