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Text readability checker

Flesch-Kincaid calculator

Text readability test

When writing words, you intend that someone will read them. It's especially true when it comes to websites. Undoubtedly, the targeted audience is happy to read our text when it's easy to do so.

What makes an 'easy-to-read' text?

There are several elements, such as content, number of sentences, words, syllables - and how we 'present' them, of course. Presentation is about font size, line height, line length, and how we format the content. Formatting and visuality lead us to web design, but this time we are writing about the 'formula' itself.

Our text readability checker is based on the original formula invented by J. Peter Kincaid in 1975.

Let's see the formula:

Flesch-Kincaid formula
(source: Wikipedia)


The 'Flesch–Kincaid' or 'text readability' test is designed to show how difficult the content is to understand. It was developed to the U.S. Navy, as such, the original formula works primarily for English.

Just type in (or paste) your text into this field, and you'll get the result right below the box.


Explanation of the result:

You need to try to achieve a Flesch Reading Ease Score between 50-100.

About the scores:
  • 0-30: Very difficult to read. It's not for an average business website.
  • 30-50: Difficult to read. When it comes to technical stuff or a complex topic, you might need it, but it's not recommended, in general.
  • 50-60: It's much better; however, it's still a bit difficult to read.
  • 60-70: That's OK. Plain English, which is easy to understand.
  • 70-80: Well done. Quite easy to read.
  • 80-90: Easy, conversational text. It's excellent for customer communication.
  • 90-100: Very easy to read, even for children.
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