LIX (Laesbarhedsindex) Definition

The Lix formula is useful for documents of Western European languages and is based on sentence length and the number of long words (long words are words over six characters).

LIX Index = average sentence length + ( (100 x long words) / words )

The score is then mapped as follows: < 30 Very easy, 30 - 40 Easy to read, 40 - 50 Medium, 50 - 60 Difficult, > 60 Very difficult