Readability Score Checker

What Is a Readability Score?

A readability score measures how easy your text is to read and understand. The most widely used formula is the Flesch Reading Ease score, which assigns a number between 0 and 100 based on sentence length and syllable count. A higher score means the text is easier to read. Content aimed at a general audience should target a score of 60-70, which corresponds to standard, plain-English writing.

How Flesch Reading Ease Is Calculated

The Flesch Reading Ease formula is:

The Flesch-Kincaid Grade Level converts the same inputs into a U.S. school grade level, telling you the minimum education level needed to understand the text.

Flesch Reading Ease Score Ranges

How to Improve Readability

• Shorten your sentences. Aim for an average of 15-20 words per sentence. Break long, compound sentences into two.
• Use simpler words. Replace multi-syllable words with shorter alternatives (e.g., "use" instead of "utilize").
• Write in active voice. Active voice is shorter and more direct than passive voice.
• Break up paragraphs. Keep paragraphs to 2-3 sentences. Walls of text are hard to scan.
• Use subheadings and bullet points. They help readers skim and find information quickly.
• Read aloud. If you stumble while reading, your audience will too.

Why Readability Matters for SEO

Google does not use readability scores as a direct ranking factor, but readable content improves user engagement signals that Google does measure: time on page, scroll depth, and bounce rate. Content that is easy to read keeps visitors on the page longer and reduces pogo-sticking (when users bounce back to search results). The most successful blog content typically scores between 60 and 70 on the Flesch Reading Ease scale.

Frequently Asked Questions

What is a good readability score?

For most web content and blog posts, a Flesch Reading Ease score of 60-70 is ideal. This means your text can be understood by the average adult reader. If your audience is more technical, a score of 50-60 may be acceptable.

What is the difference between Flesch Reading Ease and Flesch-Kincaid Grade Level?

Both formulas use the same inputs (sentence length and syllable count) but present the result differently. Flesch Reading Ease gives a score from 0-100 (higher is easier). Flesch-Kincaid Grade Level gives a U.S. school grade (lower means easier). A Flesch Reading Ease of 65 roughly corresponds to a Flesch-Kincaid Grade Level of 8.

How many words do I need for an accurate score?

You need at least 100 words for a reliable readability score. Short texts (under 100 words) can produce misleading results because a single long or short sentence has an outsized effect on the average.

Does readability affect SEO rankings?

Readability is not a direct Google ranking factor, but it strongly influences user engagement metrics. Readable content leads to longer dwell time, lower bounce rates, and more shares — all of which indirectly improve rankings.