Free Online Readability Checker
Calculate Flesch Reading Ease and grade-level scores to ensure crystal-clear writing.
Linguistic Diagnosis & Tips
- Type or paste text on the left to view suggestions.
Understanding Readability Score Ranges
| Flesch Reading Ease | Grade Level Equivalent | Reading Difficulty | Best Suited For |
|---|---|---|---|
| 90 – 100 | 5th Grade | Very Easy | Children's literature, conversational comics |
| 80 – 89 | 6th Grade | Easy | Everyday fiction, casual newsletters |
| 70 – 79 | 7th Grade | Fairly Easy | Popular blogs, how-to articles |
| 60 – 69 | 8th – 9th Grade | Standard | Mass media, corporate websites, general SEO |
| 50 – 59 | 10th – 12th Grade | Fairly Difficult | High school textbooks, business reports |
| 30 – 49 | College / Undergrad | Difficult | Academic papers, medical journals |
| 0 – 29 | Postgraduate | Very Confusing | Legal contracts, patents, specialized research |
Key Capabilities of Readability Checker
5 Readability Formulas
Instant calculations for Flesch Reading Ease, Flesch-Kincaid, Gunning Fog Index, Coleman-Liau, and ARI.
Actionable Text Diagnosis
Specific feedback identifying sentences exceeding 25 words and words with 3+ syllables that increase difficulty.
Target Audience Mapping
Maps readability scores directly to real-world educational levels from elementary school to postgraduate academic.
Private Client-Side Processing
Analyzes confidential business proposals, essays, and drafts in your browser without uploading data to servers.
How to Calculate & Improve Your Flesch Readability Score (Complete Guide)
Learn how the Flesch Reading Ease formula works and 7 practical techniques to sharpen clarity and reader retention.
Got Questions? We Have Answers
What is a good Flesch Reading Ease score for web content and blogs?
For consumer websites, blog posts, and SEO articles, a Flesch Reading Ease score between 60 and 70 (8th to 9th grade level) is ideal. This ensures your content is effortlessly understood by 85% of adult readers without sounding childish.
How is Flesch-Kincaid Grade Level calculated?
The Flesch-Kincaid Grade Level formula evaluates word length (syllables per word) and sentence length (words per sentence): Grade = 0.39 * (words / sentences) + 11.8 * (syllables / words) - 15.59. A score of 8.0 indicates an 8th-grade reading difficulty.
What is the Gunning Fog Index?
The Gunning Fog Index estimates the years of formal education a person needs to understand the text on the first reading. A Fog index of 12 represents high school senior level, while 16 represents college graduate level.
Does improving readability help Google SEO rankings?
Yes, indirectly. Highly readable content reduces bounce rates, increases dwell time, and improves user engagement. Google’s Helpful Content and ranking systems reward articles that clearly answer queries without unnecessarily convoluted prose.
Is my text sent to any server for readability calculation?
Basic readability analysis runs in your browser using JavaScript. Review the privacy policy for local draft storage and document-processing details.
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