📖 Readability Checker

What is a good readability score?

The Flesch Reading Ease score rates text from 0 to 100 based on average sentence length and the number of syllables per word. Higher is easier: 60–70 is plain English that most adults read comfortably, 30–50 is difficult and academic, and above 80 is very easy. For blog posts and online articles, aiming for roughly 60 or above keeps your writing accessible to a broad audience.

The Flesch–Kincaid grade level translates the same inputs into a U.S. school grade — a grade of 8 means a typical 13–14-year-old could read it. If your score is low, the fastest fixes are shorter sentences and simpler words. Readability is not a ranking factor by itself, but clearer writing keeps readers on the page longer, which helps SEO indirectly.

What the formula can and cannot see

The score is arithmetic on two averages: words per sentence and syllables per word. That is all Flesch ever measured, and it means the checker can be gamed and can be wrong in both directions. Chop every sentence in half and the score soars while the text turns robotic; write one elegant long sentence and the score drops while the text reads beautifully. The syllable counter is also an approximation - English spelling defeats any simple rule, so individual words are sometimes counted a syllable off. Over a full article the errors average out; over a single sentence they do not.

How to actually use the number

Treat it as a smoke detector, not a judge. A score of 25 on a blog post is a real signal that sentences have grown tangled. The difference between 62 and 68 is noise. And the final check the formula cannot perform: read the text aloud. Where you stumble, a reader stumbles - no score needed.