Readability Grade Checker
Paste your text and instantly get Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog Index scores with audience interpretation.
Use the Readability Grade Checker
Your Text
Paste any English text — at least one complete sentence for accurate results.
Syllable count uses a vowel-group heuristic (approximate — may be off by ±1 on unusual words).
Paste your text on the left and click Analyze.
Flesch Reading Ease
—Flesch-Kincaid Grade Level
—Gunning Fog Index
—Text Statistics
Summary
The Readability Grade Checker analyzes any English text and returns three industry-standard readability scores: Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog Index. All computation runs client-side in your browser — no text is sent to any server. Results include word count, sentence count, syllable count, and a plain-English audience description for each score.
How it works
- Paste or type your text into the input area.
- The tool counts words, sentences, and syllables automatically.
- Flesch Reading Ease is calculated using the standard 206.835 formula — higher scores mean easier reading.
- Flesch-Kincaid Grade Level maps the text to a US school grade (e.g., 8 = 8th grade).
- Gunning Fog Index counts complex words (3+ syllables) to estimate years of formal education required.
- Each score card shows an interpretation and the target audience for that reading level.
Use cases
- Check whether blog posts or articles suit your target audience.
- Simplify legal, medical, or technical documents for a general readership.
- Verify that student essays meet a required grade-level benchmark.
- Optimize marketing copy to keep it clear and concise.
- Evaluate government or public-health communications for accessibility.
- Compare readability before and after editing to measure improvement.
- Help ESL writers gauge the complexity of their English prose.
- Audit UX microcopy to ensure it is easy to understand at a glance.