Reading Level Calculator
Paste or type your text to instantly analyze its readability across 6 formulas
Enter at least 10 words to see readability results.
Paste Your Text to Analyze
Type or paste any English text into the box on the left. Results — including grade level, readability scores, and writing tips — appear instantly.
How to Use the Reading Level Calculator
Paste or Type Your Text
Copy any passage of English text — an article, essay, email, report, or web page copy — and paste it into the text area on the left. You can also type directly. The calculator needs at least 10 words to produce results, and 30 or more sentences for the most accurate SMOG Index score.
Click Analyze Text
Click the blue Analyze Text button (or simply wait — the tool recalculates automatically as you type). In under a second, all six readability formula scores, your consensus grade level, text statistics, and an audience description will appear on the right.
تفسير نتائجك
Review the Consensus Grade Level at the top — this averaged score is more reliable than any single formula. Check the color-coded comparison chart to see if formulas agree or disagree. Use the Text Statistics panel to identify specific issues: sentences over 20 words or complex word percentages over 15% are the two most actionable improvement targets.
Apply Improvement Tips and Export
Scroll to the Writing Improvement Tips section for personalized suggestions based on your text's actual statistics. Edit your text, re-analyze, and compare scores. When satisfied, click Export CSV to download all formula scores in a spreadsheet-ready format for reporting or documentation.
الأسئلة الشائعة
What is a good reading level for general audiences?
For content aimed at the general U.S. public — website copy, consumer product descriptions, health information, or news articles — the recommended target is Grade 6 to Grade 8, corresponding to a Flesch Reading Ease score of 60 to 80. Research shows that approximately 85% of U.S. adults can comfortably read text at or below Grade 8. Government agencies including the CDC and NIH specifically recommend targeting 6th-grade reading level for patient education materials. For marketing and promotional content, Grade 6 or below often performs best in engagement metrics. For academic or professional audiences who share specialized domain knowledge, Grade 10–14 is typical and appropriate.
Which readability formula should I use?
Different formulas are designed for different use cases. The Flesch-Kincaid Grade Level is the most widely recognized standard and a safe default. The SMOG Index is preferred in healthcare because it was developed specifically to predict comprehension of health-related materials and requires fewer assumptions — but it needs 30+ sentences for accuracy. The Gunning Fog Index is popular in business and journalism. The Coleman-Liau Index and ARI are character-based and produce consistent results for computer analysis. The Dale-Chall formula is excellent for adult-level non-fiction because it tests against a real word-frequency list. Using the Consensus Grade (the average of all formulas) reduces the risk of over-relying on any one model's assumptions and is the recommended approach for general use.
Why does the SMOG Index have a warning for short texts?
The SMOG formula was designed by G. Harry McLaughlin to work specifically with samples of exactly 30 sentences — 10 from the beginning, 10 from the middle, and 10 from the end of a longer document. When applied to texts with fewer than 30 sentences, the formula uses a correction factor (proportionally scaling the complex-word count), which introduces statistical uncertainty. McLaughlin's original research demonstrated that accuracy dropped significantly below this threshold. For very short texts (under 10 sentences), the SMOG score should be treated as a rough approximation only. The other five formulas do not have this minimum-sentence requirement and remain reasonably valid for shorter passages.
Can I use this calculator to check text in other languages?
All six formulas implemented in this calculator were developed and validated using English-language texts. The syllable-counting algorithm and complex-word detection are optimized for English phonology and morphology. While you can technically paste text in other languages, the results will be unreliable and should not be used to make decisions about non-English content. For languages such as German (long compound words), Finnish (highly agglutinative), or Mandarin (no syllable-word correspondence), the formulas would produce meaningless outputs. If you need readability analysis for non-English text, look for language-specific tools such as the Lix Index (developed for Swedish and other Scandinavian languages) or the Fernandez-Huerta scale (Spanish).
What does the Flesch Reading Ease score mean exactly?
The Flesch Reading Ease score is a 0–100 scale where higher numbers mean easier text. It was developed by Rudolf Flesch in 1948 and is calculated as: 206.835 minus 1.015 times the average words per sentence, minus 84.6 times the average syllables per word. A score of 90–100 is considered very easy (5th-grade level), suitable for comic books and consumer packaging. A score of 60–70 is plain English at the 8th-to-9th-grade level — ideal for general-purpose writing. Scores below 30 indicate very difficult text, typical of academic journals and legal documents. The score can technically exceed 100 (for extremely simple text) or fall below 0 (for extremely complex text), though both are rare in real-world documents.
How is the Consensus Grade Level calculated?
The Consensus Grade Level displayed at the top of the results is the unweighted arithmetic mean of all six grade-producing formula scores: Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index, Coleman-Liau Index, Automated Readability Index, and Dale-Chall. The Flesch Reading Ease score is excluded because it operates on a different scale (0–100 ease rather than a grade level). Each formula is given equal weight regardless of whether it is considered more or less accurate for the specific content type, because no single formula has been universally validated across all text genres. The Consensus Grade is rounded to one decimal place and is more stable than any individual formula score, reducing the impact of outliers produced by any single model.