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How to Use
- 1Paste or type your text into the input area.
- 2Scores update automatically as you type.
- 3View Flesch Reading Ease (0-100), FK Grade Level, and Gunning Fog Index.
- 4Check the stats breakdown: words, sentences, syllables, and complex words.
About Readability Score
The Readability Score tool calculates three industry-standard readability metrics: Flesch Reading Ease (100 = very easy), Flesch-Kincaid Grade Level (US school grade), and Gunning Fog Index (years of education needed).
Use it to ensure your content is appropriate for your target audience. Blog posts typically target Grade 6-8. Academic writing ranges from Grade 12 to 17+. All calculations happen in your browser.
Frequently Asked Questions
What is the Flesch Reading Ease score?
A score from 0 to 100. Higher is easier: 90-100 (very easy, 5th grade), 60-70 (standard, 8th-9th grade), below 30 (very difficult, academic/technical).
What is the Flesch-Kincaid Grade Level?
Corresponds to a US school grade level. Grade 8 is considered easy for most adults. Grade 12+ is college-level.
What is the Gunning Fog Index?
Estimates the years of formal education needed to understand the text. Below 12 is accessible; 17+ is academic.
What counts as a complex word?
Words with 3 or more syllables are counted as complex in the Gunning Fog calculation.