Readability Score Calculator
Calculate Flesch Reading Ease and Flesch-Kincaid Grade Level scores. See if your writing matches your target audience.
About Readability Score Calculator
Readability scores give you an objective measure of how easy or difficult your writing is to understand. Instead of guessing whether your audience can follow your prose, you can check the numbers and adjust accordingly. This calculator provides the two most widely used readability metrics - Flesch Reading Ease and Flesch-Kincaid Grade Level - along with the underlying statistics that drive them.
Two established metrics
The Flesch Reading Ease score ranges from 0 to 100, where higher values mean simpler text. The Flesch-Kincaid Grade Level maps the same linguistic features to an approximate U.S. school grade, making it intuitive: a score of 10.0 means a tenth-grader should be able to read the text comfortably. Both formulas are based on sentence length and syllable count per word.
Color-coded interpretation
The tool does not just show a number - it displays a color-coded indicator and a plain-language description of the result. Green signals text that is easy for general audiences, yellow indicates moderate complexity, and red marks text that may be too dense for casual readers. This visual feedback makes it quick to gauge your writing at a glance.
Detailed text statistics
Below the scores you will find a breakdown of word count, sentence count, syllable count, average words per sentence, and average syllables per word. These figures help you pinpoint exactly what is making your text easier or harder to read, so you can make targeted edits rather than rewriting blindly.
Paste your draft, review the scores, tighten long sentences or swap complex words, and check again. Everything runs in your browser with no data sent anywhere.
Frequently Asked Questions
What is the Flesch Reading Ease score?
The Flesch Reading Ease score rates text on a 0 to 100 scale. Higher scores mean the text is easier to read. A score of 60 to 70 is considered acceptable for most general audiences, while scores above 80 indicate text that is very easy to read, and scores below 30 suggest academic or technical material.
What does the Flesch-Kincaid Grade Level mean?
The Flesch-Kincaid Grade Level estimates the U.S. school grade level needed to understand the text. A score of 8.0 means an eighth-grader should be able to comprehend the material. Most popular writing targets a grade level between 6 and 8, while technical and legal writing often scores above 12.
How are syllables counted?
The tool estimates syllables using a set of English-language heuristics: it counts vowel groups in each word, adjusts for silent trailing 'e', and handles common patterns like '-le' endings and diphthongs. While not perfect for every word, the method produces reliable scores that closely match manual counts across typical English text.
What readability score should I aim for?
It depends on your audience. For general web content and blog posts, aim for a Flesch Reading Ease score of 60 to 70 (roughly grade 7-8). Marketing copy often targets 70 to 80 for broad appeal. Academic papers and technical documentation naturally score lower, and that is appropriate for their specialized audience.