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Free grammar tool

Readability Checker

Check how easy your writing is to read with Flesch scores and long-sentence alerts.

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How to use the readability checker

Paste at least a few sentences. The tool calculates the Flesch Reading Ease score, the US grade level, the average sentence length and lists sentences that are longer than 25 words.

How to read the score

  • 90 to 100: very easy
  • 70 to 89: easy to fairly easy
  • 60 to 69: plain English
  • 50 to 59: fairly difficult
  • Below 50: difficult

How to make your writing easier to read

  • Keep most sentences under 20 words.
  • Choose short, common words.
  • Use the active voice.
  • Give each paragraph one idea.

Frequently asked questions

What is a good readability score?

For general web content, aim for a reading ease of 60 or higher.

What does grade level mean?

It estimates the US school grade needed to understand the text. Grade 8 is a common target for public writing.

How is the score calculated?

It uses the average sentence length and the average number of syllables per word.

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