Reading Level Checker
Analyze text readability using Flesch Reading Ease, Flesch-Kincaid, and Gunning Fog formulas. Get grade level assessments and detailed statistics for better writing. Perfect for educators, writers, and content creators.
Continue Your Text Journey
What is Reading Level Checker?
The Reading Level Checker analyzes text to calculate readability using three established formulas: Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog Index. It counts words, sentences, syllables, and complex words (three or more syllables) to produce scores. The tool also shows a grade-level interpretation from elementary through graduate school. All processing happens in the browser.
How does Reading Level Checker work?
This tool extracts text statistics (word count, sentence count, syllable count, complex word count) and applies three readability formulas. Flesch Reading Ease produces a 0-100 score (higher is easier). Flesch-Kincaid estimates US grade level. Gunning Fog Index estimates years of education needed. The results are color-coded by difficulty level.
Key Features
- Flesch Reading Ease, Flesch-Kincaid, and Gunning Fog scores
- Word, sentence, syllable, and complex word counts
- Grade level interpretation with color coding
- Real-time analysis as you type
- Copy or download analysis report
- Preset example texts for testing
- Handles text of any length
- Runs in the browser with no uploads
Common Use Cases
Writing for a specific audience
Check that your article reads at an 8th-grade level for a general audience, or at a college level for academic readers.
Simplifying complex documents
Run readability checks before and after editing a legal or technical document to confirm it got easier to read.
Optimizing web content for SEO
Ensure blog posts and landing pages are at a readability level that maximizes engagement and reduces bounce rate.
Teaching writing skills
Have students check their essays for readability scores to understand how sentence length and word choice affect clarity.
How to Use This Tool
Paste your text
Copy and paste text into the analysis area.
View live statistics
Word count, sentence count, and syllable count update as you type.
Check scores
Review the three readability scores and the grade-level interpretation.
Copy or download
Copy the analysis summary or download a detailed report.
Pro Tips
- 1
Flesch Reading Ease of 60-70 is standard for general audiences.
- 2
Shorter sentences and simpler words lower the grade level.
- 3
Web content should target 6th to 8th grade for maximum accessibility.
- 4
Academic writing typically sits at 12th grade or above.
Frequently Asked Questions
What do the readability scores mean?
Flesch Reading Ease ranges from 0 to 100, with higher scores meaning easier reading. Flesch-Kincaid estimates US grade level. Gunning Fog estimates years of formal education needed to understand the text.
How accurate are the formulas?
These are scientifically validated formulas used by educators and publishers worldwide. They are highly reliable for English text but may vary for poetry, technical jargon, or non-English languages.
Does it work with non-English text?
The formulas are designed for English syllable and sentence structures. Results for other languages will be inaccurate.
Is my text uploaded to a server?
No. All analysis happens in your browser using JavaScript. The text never leaves your device.
How can I improve my readability score?
Use shorter sentences (15-20 words), choose simpler words, and break up long paragraphs. Active voice also helps.