document.getElementById('rdcBreakdownVal').innerHTML = breakdown;
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How to Calculate Your Readability Score
Our free readability checker analyzes your text to estimate its complexity and reading ease. Follow these steps:
- Paste your text — Copy and paste your blog post, essay, or email into the editor box.
- Automatic calculation — The checker calculates your grade level and Flesch Reading Ease score in real-time as you type.
- Review the stats — Inspect the word count, sentence count, syllables per word, and average sentence length to help you simplify complex phrasing.
What is Flesch Reading Ease?
The Flesch Reading Ease formula yields a score from 0 to 100. Higher scores indicate text that is easier to read, while lower scores indicate more complex, academic text:
- 90 to 100: Very Easy. Easily understood by an average 11-year-old student (5th grade).
- 60 to 70: Standard. Easily understood by 13- to 15-year-old students (8th to 9th grade). Best for standard web copy and blogs.
- 0 to 30: Very Difficult. Best understood by college graduates. Typical for legal documents and scientific journals.
The Readability Formulas
Our checker implements the two most famous algorithms for text analysis:
1. Flesch Reading Ease Score
Ease = 206.835 − 1.015 × (Total Words ÷ Total Sentences) − 84.6 × (Total Syllables ÷ Total Words)
2. Flesch-Kincaid Grade Level
Translates the Flesch Reading Ease score to a standard US school grade level (representing the years of education required to comprehend the text):
Grade = 0.39 × (Total Words ÷ Total Sentences) + 11.8 × (Total Syllables ÷ Total Words) − 15.59
Tips to Improve Your Readability Score
If your text is too difficult for your target audience, use these editing tips:
- Shorten your sentences: Cut long sentences in half. Aim for an average of 15 to 20 words per sentence.
- Use simpler words: Replace long, multi-syllable words with simpler terms (e.g., use “help” instead of “facilitate”, and “use” instead of “utilize”).
- Use active voice: Write “We launched the tool” instead of “The tool was launched by us.” Active voice reduces sentence length and increases clarity.
- Remove filler words: Trim unnecessary words (e.g., replace “in order to” with “to”).
Frequently Asked Questions
What is a good readability score for SEO?
For standard blog posts and website content, aim for a **Flesch Reading Ease score of 60 to 70** (8th to 9th-grade reading level). Google prefers content that is clear and easy for a general audience to read quickly.
Does this readability tool save or share my text?
No. The entire analysis runs locally in your browser using JavaScript. No text is uploaded to any server or saved in a database, ensuring complete privacy for your drafts.
What does a grade level of 8 mean?
A grade level of 8 means the text is written at an 8th-grade level (typical for a 13- or 14-year-old student). This is the standard target for general-interest magazines and popular novels.
How does the calculator identify syllables?
The calculator uses an algorithmic syllable counter that checks for vowel patterns and silent letters. While highly accurate, there may be slight variances on rare or foreign words compared to dictionary pronunciations.
