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flesch-kincaid

Formula to detect the grade level of text according to Flesch-Kincaid Grade Level (1975)

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Formula to detect the grade level of text according to the Flesch–Kincaid Grade Level.

See syllable for detecting syllables.

Installation

npm:

npm install flesch-kincaid

Usage

var fleschKincaid = require('flesch-kincaid');
 
/* For “The Australian platypus is seemingly a hybrid of
 * a mammal and reptilian creature.” (1 sentence, 13 words,
 * 26 syllables). */
fleschKincaid({
  sentence: 1,
  word: 13,
  syllable: 26
});
// 13.08 

API

fleschKincaid(counts)

Given an object containing the number of words (word), the number of sentences (sentence), and the number of syllables (syllable) in a document, returns the U.S. grade level associated with the document.

Values can theoretically start at -3.40 and end at Infinity.

Related

  • automated-readability — Uses character count instead of error-prone syllable parser;
  • coleman-liau — Uses letter count instead of an error-prone syllable parser;
  • dale-chall-formula — Uses a dictionary; suited for higher reading levels;
  • flesch — Uses syllable count;
  • gunning-fog — Uses syllable count; needs POS-tagging and NER;
  • smog-formula — Like gunning-fog-index; without needing advanced NLP;
  • spache-formula — Uses a dictionary; suited for lower reading levels.

License

MIT © Titus Wormer