Readability Checker
Check readability scores including Flesch-Kincaid grade level and reading ease.
Readability formulas have been around since the 1940s, and they all answer the same question: how much education does someone need to read this comfortably? The checker runs the major ones at once - Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, Coleman-Liau and ARI - so you can see where they agree.
The pattern they usually expose: writers write a grade or two above what their audience prefers to read. A blog scoring at college level isn't wrong, but it demands more effort than many casual visitors are willing to spend, and some of them give up early.
What the Scores Actually Mean
Flesch Reading Ease
This one goes from 0 to 100. Higher means easier. A score of 60-70 is the sweet spot for web content. That's roughly an 8th-9th grade level, which might sound low but it's where most popular websites sit. Even professional writers with PhDs aim for this range online.
Flesch-Kincaid Grade Level
This converts your readability into a U.S. school grade. A grade level of 8 means an average 8th grader could understand it. For general web content, aim for grades 6-8. The New York Times writes at around a 9th-10th grade level. Hemingway wrote at a 4th grade level and nobody called his work dumb.
Gunning Fog Index
This estimates how many years of education someone needs to get your text. A Fog Index of 12 means you need about a high school senior's reading ability. For broad audiences, keep it under 10.
Coleman-Liau Index
This formula uses character count instead of syllables, which makes it faster and sometimes more reliable for certain text types. It gives you a grade level just like Flesch-Kincaid.
Readability Score Quick Reference
- 90-100: Super easy (5th grade) - basic instructions and children's content
- 80-89: Easy (6th grade) - conversational writing
- 70-79: Fairly easy (7th grade) - most blog posts and magazines
- 60-69: Standard (8th-9th grade) - the target for web content
- 50-59: Fairly tough (10th-12th grade) - business reports and journalism
- 30-49: Difficult (college level) - academic papers
- 0-29: Very difficult (graduate level) - legal and scientific writing
How to Actually Improve Your Score
The two biggest things that tank readability are long sentences and big words. Breaking a 35-word sentence into two shorter ones can bump your score significantly. Swapping "approximately" for "about" or "utilize" for "use" helps too.
But don't chase a number blindly. If you're writing for doctors or engineers, a higher grade level is expected. The point is matching your writing to your audience, not dumbing everything down to a 5th grade level.
How to Use
- Paste your text into the editor above.
- Check the Flesch Reading Ease score for a quick overview.
- Look at the grade level to see if it matches your target audience.
- Shorten sentences and swap complex words to improve your scores.
Frequently Asked Questions
What readability score should I aim for?
For web content, aim for a Flesch Reading Ease score of 60-70 and a grade level between 6-8. That covers the widest possible audience. Even well-educated readers prefer content at this level online.
How can I improve my readability score?
Shorten your sentences. That's the single biggest thing you can do. After that, swap long words for shorter ones ("use" instead of "utilize") and break up big paragraphs. Avoid passive voice when you can.
Is a higher or lower Flesch score better?
Higher is easier. A Flesch Reading Ease score of 80 means your text is easy to read. A score of 30 means it's quite difficult. For most web content, you want a higher score.
Does readability affect SEO?
Google doesn't use readability scores directly for ranking. But easier-to-read content gets lower bounce rates, more shares and longer time-on-page. Those signals do affect rankings indirectly.
What formulas does this tool calculate?
It runs Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, Coleman-Liau Index and the Automated Readability Index (ARI). Each formula looks at different aspects of your text.
Should I always write at a low grade level?
Not always. Match your writing to your audience. A medical journal article should be at a higher level than a cooking blog. The tool helps you check where you land so you can adjust if needed.