Readability Score Checker
Analyze your text with Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, and SMOG Index. Get sentence-level breakdowns and actionable improvement tips.
Frequently Asked Questions
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We calculate four industry-standard readability scores: Flesch Reading Ease (0-100 scale, higher is easier), Flesch-Kincaid Grade Level (US school grade), Gunning Fog Index (years of formal education needed), and SMOG Index (grade level based on polysyllabic words). Together they give a comprehensive picture of your text's complexity.
For general web content, aim for a Flesch Reading Ease score of 60-70, which corresponds to an 8th-9th grade reading level. This ensures your content is accessible to the broadest audience. Academic papers may target 30-50, while children's content should aim for 80-90.
We use a heuristic algorithm that counts vowel groups in words, which provides an accurate approximation for English text. While not perfect for every word, it produces reliable results for readability calculations across standard English writing.
These readability formulas are designed for English text. Results for other languages may not be accurate. The syllable counting and complexity measurements are English-specific.