Free Readability Score Checker
Paste your content to instantly calculate Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG, and sentence complexity. Write for your audience, not against them.
Readability scores and grade level will appear here once you paste some text.
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Why Readability Directly Impacts Your SEO
Readability is not just a nice-to-have — it is the difference between content that holds readers and content that drives them back to Google to find a clearer answer.
Plain, direct writing is easier to skim, easier to trust, and easier to act on. Most web content reads best at around grade 7–9 — even when the audience is highly educated, because people scan on screens rather than read every word.
Dwell Time is a Ranking Signal
Readable content keeps visitors on the page longer and makes it more likely your page actually answers the question they searched for.
Featured Snippet Eligibility
Google tends to pull featured snippets from well-structured, clearly written paragraphs. Overly complex text is rarely chosen — even when the information is accurate.
- Reduce bounce rate by writing at the right grade level
- Improve featured snippet eligibility with clear, direct prose
- Make your content accessible to non-expert audiences
Flesch Reading Ease
72
Fairly Easy (7th grade)
How to Use the Readability Checker
Get a full readability analysis in seconds — no account, no install, no friction.
Paste Your Content
Drop any blog post, landing page copy, email, or article draft into the text area. Scores update live as you type.
Review the Scores
See the Flesch Reading Ease gauge, Flesch-Kincaid Grade Level, sentence complexity, and reading time — all in one view.
Apply the Suggestions
Follow the targeted suggestions to shorten sentences, replace complex words, and hit the ideal readability range for your audience.
Who Uses the Readability Checker
Anyone who writes for a non-specialist audience needs to know their reading level.
Bloggers & SEOs
Check that every post lands around grade 7–9 before publishing so it is easy to read and skim.
Content Editors
Quickly audit guest posts and agency deliverables for readability before they go live on your site.
Marketers
Test landing page and email copy for clarity. Clear copy is easier to act on.
Technical Writers
Balance accuracy with readability in documentation. Know exactly which sections need to be simplified.
Frequently Asked Questions
What is the Flesch Reading Ease score?
The Flesch Reading Ease formula, developed by Rudolf Flesch in 1948, produces a score from 0 to 100. Higher scores mean the text is easier to read. A score of 60–70 is considered appropriate for general web content. The formula is: 206.835 − (1.015 × average words per sentence) − (84.6 × average syllables per word).
What is the Flesch-Kincaid Grade Level?
The Flesch-Kincaid Grade Level uses the same inputs as Reading Ease (sentence length and syllables per word) but expresses the result as a U.S. school grade. A score of 8 means the text is appropriate for an 8th grader. Most popular online content targets grade 6–9. Academic and legal documents often score above 12. The formula is: (0.39 × avg words/sentence) + (11.8 × avg syllables/word) − 15.59.
What is a good readability score for SEO?
Google has confirmed that readability is not a direct ranking factor. However, readable content is easier for visitors to engage with, which helps your page satisfy the searcher. Aim for a Flesch score of 60–70 (standard/grade 8–9) for most blog content. If you're writing for a specialist audience (medical, legal, technical), a lower score is expected and appropriate.
How are syllables counted?
This tool uses a vowel-group heuristic: consecutive vowels (a, e, i, o, u, y) count as one syllable group, with a silent trailing "e" removed. This is an approximation — it handles the vast majority of common English words correctly but may slightly miscount irregular words.
What are complex words in the readability analysis?
Complex words are words with 3 or more syllables. When complex words make up more than 15–20% of your text, readers slow down significantly. The Gunning Fog index (another readability metric) uses this percentage as a primary input. Reducing complex word usage is one of the fastest ways to improve readability.
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Key terms explained
Plain-English definitions from the LazySEO SEO glossary.