Lix (readability test)

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LIX (abbreviation of Swedish läsbarhetsindex, "readibility index") is a readability measure indicating the difficulty of reading a text[1] developed by Swedish scholar Carl-Hugo Björnsson. It is computed as follows:

, where

is the number of words,

is the number of periods (defined by period, colon or capital first letter), and

is the number of long words (more than 6 letters).[2]


  1. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2010-06-16. Retrieved 2010-05-10.CS1 maint: archived copy as title (link)
  2. ^ Hjørland, Birger. "Readability (and legibility)". Archived from the original on 2016-06-30.

Further reading[edit]

  • Björnsson, C. H. (1968). Läsbarhet. Stockholm: Liber.
  • Björnsson, C. H. (1971). Læsbarhed. København: Gad.

External links[edit]