Work out username idea count instantly with clear inputs, formula shown and shareable results.
Independent choices multiply, so the total is base words times suffixes times numeric endings, and the entropy is the base-two logarithm of that product. The multiplication is why adding a two digit number to a name multiplies the options by a hundred, which is exactly why so many usernames end in numbers.
Combinations
total = base words x suffixes x numeric endings
total = base words x suffixes x numeric endings. Independent choices multiply, so the total is base words times suffixes times numeric endings, and the entropy is the base-two logarithm of that product.
The multiplication is why adding a two digit number to a name multiplies the options by a hundred, which is exactly why so many usernames end in numbers.
Enter base words available, suffixes available, numeric endings available. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.