Free online readability checker


How we calculate readability

We offer a free to use online readability checker to calculate your content’s readability score. The calculation we use is based on the Flesch-Kincaid reading ease formula.

Flesch-Kincaid reading ease formula

The formula below was published by Rudolph Flesch in 1948, making it an extremely old readability formula. However, due to its accuracy and global recognition, it’s become the industry standard for content writers.

206.835 – 1.015 x (words/sentences) – 84.6 x (syllables/words)

What’s a good reading ease score?

A good Flesch-Kincaid reading ease score should depend on your audience’s age group.

Please, use the breakdown below to ensure that your content’s readability is written towards your target reader’s age group:

  • 90–100 – an average 11-year-old can understand your content (very easy).
  • 60–90 – an average 12–15-year-old can understand your content (easy).
  • 50–60 – a high school student can understand your content (normal).
  • 30–50 – a college student can understand your content (difficult).
  • 0–30 – a college/university graduate can understand your content (very difficult).

Other methods for better readability

Use Yoast SEO for WordPress

Caption: Using the Yoast SEO WordPress plugin to analyse reliability scores.

Yoast SEO is a free WordPress plugin which we highly recommend.

As not only does it automatically add general website SEO markup, but also includes a built-in readability analyser, which you can use to analyse your content as and when you’re writing it.

Use Grammarly

Caption: An example of using Grammarly in WordPress.

Grammarly is another tool which we highly recommend.

It again has on-the-go features, but more importantly, it helps to analyse your content for the correct usage of grammar.


*Please note, as we try to provide you with the most accurate readability score, our readability checker may not always provide 100% accurate readability scores.