Text tool

Readability Checker

Flesch reading ease, grade level and long sentences.

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–Flesch reading ease
–Flesch-Kincaid grade
–Words per sentence
–Syllables per word
0Words
0Sentences
0Long sentences

Long sentences highlighted

About this tool

Readability Checker scores English text with the Flesch reading ease and Flesch-Kincaid grade formulas. It also highlights long sentences so you know which ones to split.

How to use Readability Checker

  1. Paste your text.
  2. Read the scores.
  3. Shorten the highlighted sentences.

Questions people ask

How is Flesch reading ease calculated?

Score = 206.835 − 1.015 × (words ÷ sentences) − 84.6 × (syllables ÷ words). Higher is easier. 60 to 70 is plain English that most adults read easily.

What is the Flesch-Kincaid grade level?

Grade = 0.39 × (words ÷ sentences) + 11.8 × (syllables ÷ words) − 15.59. It estimates the US school grade needed to understand the text, so 8 means a 13 to 14 year old.

How accurate is the syllable count?

Syllables are estimated from vowel groups, which is close for most English words but not exact. The formulas are designed for English and give poor results for other languages.

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