Click Generate to get random letters.
Uses for Random Letters
Drawing from the full alphabet, each letter has a 1 in 26 chance, about 3.85%, and a vowel comes up 5 times in 26 (19.2%). Choose how many letters you want, the pool (all letters, vowels or consonants), the case and whether letters may repeat, and the generator draws them in one click.
Random letter generators have many practical uses. Word games like Scrabble and Boggle need random letter draws. Language teachers use random letters for spelling and vocabulary exercises. Creative writers use them as prompts to escape habitual word choices. Memory training techniques use random letter sequences to build working memory capacity.
Word Games
ESL Teaching
Kids Learning
Creative Writing
The English Alphabet at a Glance
The English alphabet has 26 letters: 5 vowels (A, E, I, O, U) and 21 consonants. The letter E is the most frequent in English text at approximately 13% of all letters. Q, X, and Z are the rarest. The most common starting letter for English words is S, followed by C and P. This generator assigns equal probability to all 26 letters regardless of natural frequency, so every letter has the same 1 in 26 chance instead of following how often it appears in English.
For Scrabble players: the standard English Scrabble set has 100 tiles with a specific distribution. E appears 12 times, A and I 9 times each, while Q, Z, J, and X appear only once. This generator does not copy the Scrabble tile mix; every letter is equally likely.
Letter Odds by Pool
| Pool | Letters in pool | Chance of any one letter |
|---|---|---|
| All letters | 26 | 3.85% (1 in 26) |
| Vowels only | 5 (A, E, I, O, U) | 20% (1 in 5) |
| Consonants only | 21 (Y counts as a consonant) | 4.76% (1 in 21) |
Repeats and Vowels in a Multi-Letter Draw
With duplicates allowed, a repeated letter shows up surprisingly often, for the same reason two people in a small group often share a birthday.
| Letters drawn (all 26) | Chance of at least one repeat |
|---|---|
| 3 | 11.2% |
| 5 | 33.6% |
| 7 | 58.7% |
| 10 | 86.3% |
Will a 7-letter rack have a vowel?
Drawing 7 letters from the full alphabet, the chance of no vowel at all is 22.4% with repeats allowed and 17.7% with unique letters. A real Scrabble bag is friendlier: 42 of its 100 tiles are vowels (9 A, 12 E, 9 I, 8 O, 4 U), against 5 of 26 letters here. For word-game practice, one vowels-only draw plus a consonants-only draw gives a more playable rack.
How Many Combinations Are There?
| Letters | Sequences with repeats | Sequences without repeats |
|---|---|---|
| 2 | 676 | 650 |
| 3 | 17,576 | 15,600 |
| 4 | 456,976 | 358,800 |
| 5 | 11,881,376 | 7,893,600 |
| 26 (full alphabet) | about 6.16 × 1036 | about 4.03 × 1026 |
With repeats the count is 26 to the power of the number of letters; without repeats it is 26 × 25 × 24 and so on.
How the Letters Are Drawn
Each letter is picked with Math.floor(Math.random() × pool size), so every letter in the pool has exactly the same chance. With duplicates off, the whole pool is shuffled with the Fisher-Yates method and the first letters are taken, which rules out repeats without favoring any order. Mixed case flips a separate coin for each letter.
Math.random is the browser's standard pseudorandom generator: ideal for games, classrooms and writing prompts, but not for passwords or codes that must be hard to guess. For those, use the password generator, which uses the crypto API.