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Readability Checker

Check your content's readability score and identify complex sentences that hurt engagement and increase bounce rates.

Flesch Reading Ease scale.

What each score range means and what audience it suits best.

90–100

Very Easy

5th grade. Easily understood by an average 11-year-old student.

80–90

Easy

6th grade. Conversational English for consumers.

70–80

Fairly Easy

7th grade. Suitable for most online audiences.

60–70

Standard

8th-9th grade. Plain English. Target range for most web content.

50–60

Fairly Difficult

10th-12th grade. High school level. Typical for industry blogs.

30–50

Difficult

College. Dense, academic, or technical content.

0–30

Very Difficult

College graduate. Best understood by university graduates.

What is a readability score?

A readability score is a numerical estimate of how easy or difficult a piece of text is to read. The most widely used formula, Flesch Reading Ease, measures the average sentence length and average syllables per word to produce a score from 0 to 100. Higher scores mean simpler, more accessible writing.

Readability has a direct impact on content performance. Studies consistently show that simpler writing earns longer dwell times, more shares, and better conversion rates. While Google has not confirmed readability as a direct ranking factor, pages that are easy to read tend to accumulate the engagement signals that do influence rankings.

Shorten your sentences

Aim for an average of 15-20 words per sentence. Break long sentences into two shorter ones. Rhythm matters, so mix lengths, but keep the average readable.

Prefer short words

Choose simple alternatives where possible. 'Use' beats 'utilize'. 'Help' beats 'facilitate'. Shorter words reduce syllable count and lift your Flesch score.

Use active voice

Active voice reads faster and feels more direct. 'The team shipped the update' is clearer than 'The update was shipped by the team'.

Break up paragraphs

Dense walls of text discourage reading. Keep paragraphs to 2-4 sentences on the web, and use subheadings to create scannable structure.

Frequently asked questions.

What is the Flesch Reading Ease score?

The Flesch Reading Ease score is a readability formula developed by Rudolf Flesch in 1948. It produces a number from 0 to 100 where higher scores mean easier-to-read text. A score of 60-70 is considered plain English, readable by the average 13-15 year old student. A score below 30 is considered very difficult, suited for college graduates.

What is a good readability score for SEO content?

For most web content targeting a general audience, aim for a Flesch score between 60 and 70, which corresponds to a 7th-8th grade reading level. This range is associated with better engagement, lower bounce rates, and broader reach. Technical or B2B content can score lower (around 50-60) without hurting performance.

Does readability affect Google rankings?

Readability is not a direct ranking factor, but it strongly influences metrics that are. Easy-to-read content typically earns longer dwell times, more shares, and lower bounce rates, all of which signal quality to Google. Pages that readers find clear and accessible tend to rank better over time.

What is the Flesch-Kincaid Grade Level?

The Flesch-Kincaid Grade Level converts readability into a US school grade. A grade of 8 means the text is readable by a typical 8th-grade student (around 13-14 years old). Most consumer-facing web content targets grades 6-9. Academic and technical content often lands at grade 12 or higher.

How can I improve my content's readability score?

Shorten your sentences to around 15-20 words on average. Replace long words with shorter synonyms where possible. Use active voice instead of passive voice. Break up long paragraphs into smaller chunks. Add subheadings to structure the content and make scanning easier.

What is considered the optimal sentence length?

For web content, aim for an average sentence length of 15-20 words. Sentences over 25 words become noticeably harder to follow. Mix short and long sentences to create rhythm, but keep the average in the target range for the easiest reading experience.

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