Analyze Your Content's Readability Score Online Calculate Flesch-Kincaid, Gunning Fog, and other readability scores for your content.

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Content Readability Score

Calculate Flesch-Kincaid, Gunning Fog, and other readability scores for your content.

Paste your content

Enter the text you want to analyze for readability.

Review scores

See Flesch-Kincaid grade level, Flesch Reading Ease, and Gunning Fog Index.

Optimize readability

Follow suggestions to improve sentence length, word complexity, and paragraph structure.

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What Is Content Readability Score?

The Content Readability Score Calculator analyzes your text using multiple readability formulas to determine how easy it is to read. Web content should target a Grade 8-10 reading level — accessible to the broadest audience while maintaining professional quality. The tool calculates Flesch-Kincaid Grade Level, Flesch Reading Ease score, Gunning Fog Index, and provides statistics on sentence length, word complexity, and paragraph structure. Readable content keeps visitors on your page longer, reducing bounce rate — a user engagement signal that can indirectly influence SEO rankings.

Why Use Content Readability Score?

Multiple readability formulas: Flesch-Kincaid, Gunning Fog, Coleman-Liau
Grade level targeting for different audiences
Sentence and word complexity analysis
Paragraph length and structure checks
Actionable suggestions for improving readability

Common Use Cases

Blog Writing

Ensure blog posts are accessible to your target audience.

SEO Content

Improve dwell time by making content easier to read.

Technical Writing

Simplify complex topics for general audiences.

Marketing Copy

Write clear, compelling copy that converts.

Technical Guide

The Flesch-Kincaid Grade Level formula: 0.39 × (words/sentences) + 11.8 × (syllables/words) - 15.59. The Flesch Reading Ease: 206.835 - 1.015 × (words/sentences) - 84.6 × (syllables/words). Higher Reading Ease scores (60-70) indicate easier text. The Gunning Fog Index: 0.4 × ((words/sentences) + 100 × (complex words/words)), where complex words have 3+ syllables. For web content, target Flesch-Kincaid Grade Level 8-10 and Flesch Reading Ease 60-70. Average sentence length should be 15-20 words, with no sentence exceeding 25 words.

Tips & Best Practices

1
Target Flesch-Kincaid Grade Level 8-10 for general web content
2
Keep average sentence length between 15-20 words
3
Use short paragraphs (2-4 sentences) for web content
4
Replace complex words with simpler alternatives when possible
5
Mix short and long sentences for engaging rhythm

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Frequently Asked Questions

Q What reading level should web content target?

Grade 8-10 for general audiences. This makes content accessible to approximately 80% of English-speaking adults.

Q Does readability affect SEO?

Not directly, but readable content improves user engagement metrics (time on page, bounce rate) which can indirectly influence rankings.

About This Tool

Content Readability Score is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.