All Fermi answers
Fermi #44 · Question 2

How many words were on Wordle's original answer list when it launched in 2021?

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

2QUESTION 2 OF 3

Answer & explanation

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

Answer & explanation

Official answer

2,315

words

How to estimate it

Fermi’s official “Napkin math”

Start with a decent dictionary, call it 100,000 words, and five letters is about as common as word lengths get, so say one in ten. How many of those would you put in a daily puzzle? Only the ones everybody knows, so call it a quarter.

Words in a decent dictionary
≈ 100,000
Share that are five letters
≈ 1 in 10
Common enough for a daily puzzle
≈ 1 in 4
100,000 ÷ 10 ÷ 4
≈ 2,500

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

Source calculation & reference
Five-letter words in English (rough pool)
≈ 12,000+
Familiar words selected as answers
→ 2,315 words
Wordle's original 2021 answer list
2,315 words

Reference cited by Fermi: Original Wordle answer list, archived from the source code by cfreshman

How close was your guess?

Your comparison will appear here.

Compare by ratio: divide the larger number by the smaller one. The closer to 1×, the better.

Skip to main content