Word letter arrangements calculator
Type a word like MISSISSIPPI to see how many different strings you can make by rearranging all of its letters.
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How to use it
- Enter word and treat upper and lower case as different.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Arrangements = n! ÷ (c1! × c2! × c3! and so on), where n is the number of letters and each c is how often a letter repeats.
Example
Inputs: Word = MISSISSIPPI, Treat upper and lower case as different = no. Result: Distinct arrangements: 34,650; Letters: 11; Distinct letters: 4.
MISSISSIPPI
i × 4, s × 4, p × 2, m × 1
Limits and caveats
- Spaces and Arabic diacritics are removed; every other symbol, including digits, counts as a letter.
- Every arrangement is counted, meaningful or not.
Questions about this tool
How many arrangements does MISSISSIPPI have?
11! ÷ (4! × 4! × 2!) = 34650 distinct arrangements.
Why divide by the factorial of each repeat?
Swapping two identical letters gives the same word, so those duplicates are divided out.
Does it work with Arabic words?
Yes. Diacritics are ignored, but alef forms, hamza and ta marbuta count as different letters.