Free Readability Score Checker — Flesch-Kincaid & Grade Level Online

Last Updated: May 2026  ·  5 min read

Whether you're writing a blog post, landing page, email, or technical documentation, readability directly affects how many people finish reading your content. Our free readability checker scores your text using the Flesch-Kincaid formula, shows your grade level, estimates reading time, and gives actionable tips to improve clarity — all in your browser, no signup required.

What Is a Readability Score?

A readability score measures how easy a piece of text is to read and understand. The most widely used formula is the Flesch Reading Ease score, developed by Rudolf Flesch in 1948:

Score = 206.835 − (1.015 × avg words per sentence) − (84.6 × avg syllables per word)

Higher scores = easier to read. Lower scores = harder to read.

Flesch Reading Ease Score Chart

Score Difficulty Reading Level Examples
90–100 Very Easy Grade 5 Children's books, simple instructions
80–90 Easy Grade 6 Conversational, tabloid news
70–80 Fairly Easy Grade 7 Most popular fiction
60–70 Standard Grade 8–9 Most web content, Time magazine
50–60 Fairly Difficult Grade 10–12 Academic articles, professional journals
30–50 Difficult College Technical documentation
0–30 Very Difficult Graduate Legal documents, scientific papers

Target for web content: 60–70 (standard). Blog posts, marketing copy, and landing pages perform best at this range.

Flesch-Kincaid Grade Level

The Flesch-Kincaid Grade Level converts the reading ease score into a US school grade:

Grade Level = (0.39 × avg words per sentence) + (11.8 × avg syllables per word) − 15.59

A grade level of 8 means your text can be understood by a typical 8th-grader (14-year-old). Most professional content targets grades 8–10.

What Our Free Readability Checker Analyzes

Paste your text and instantly get:

  • Flesch Reading Ease score (0–100)
  • Flesch-Kincaid Grade Level
  • Word count
  • Sentence count
  • Average words per sentence
  • Average syllables per word
  • Estimated reading time (at 200 words per minute)
  • Plain English difficulty label
  • Actionable improvement tips

Why Readability Matters for SEO

Google's Helpful Content guidelines emphasize content written for people, not search engines. Readable content:

  1. Reduces bounce rate — readers who can follow your content stay longer
  2. Increases dwell time — a key SEO ranking signal
  3. Improves featured snippet chances — clear, direct sentences are more likely to be featured
  4. Boosts social sharing — easy-to-read content gets shared more
  5. Increases conversion — simpler product descriptions convert at higher rates

Studies show that lowering your reading grade level by 1–2 grades can increase comprehension by 36% for the same audience.

How to Improve Your Readability Score

1. Shorten your sentences

The biggest driver of low scores is long sentences. Aim for 15–20 words per sentence on average. If a sentence has more than 25 words, consider splitting it.

2. Use simpler words

Replace Latinate words with simpler Anglo-Saxon alternatives: - "utilize" → "use" - "commence" → "start" - "approximately" → "about" - "terminate" → "end" - "demonstrate" → "show"

3. Break up long paragraphs

Paragraphs of 3–4 sentences are ideal for web reading. One idea per paragraph.

4. Use bullet points and lists

Lists are easier to scan than dense prose. They reduce perceived complexity.

5. Use the active voice

  • Passive: "The report was written by the team"
  • Active: "The team wrote the report"

Active sentences are shorter, clearer, and more engaging.

6. Reduce nominalization

Nominalizations are nouns made from verbs ("consideration" from "consider"): - "Make a decision" → "Decide" - "Give a recommendation" → "Recommend" - "Provide an explanation" → "Explain"

Readability Benchmarks by Content Type

Content Type Target Flesch Score Target Grade Level
Children's books 90–100 1–5
Blog posts 65–75 7–9
News articles 60–70 8–10
Marketing copy 70–80 6–8
Technical docs 40–60 10–13
Legal documents 10–30 Graduate
Academic papers 0–30 Graduate

How to Check Your Text Readability Free

  1. Go to SolutionGigs Free Readability Checker
  2. Paste or type your text in the input area
  3. See your Flesch score, grade level, stats, and tips instantly
  4. Edit your text to see the score update in real time
  5. No signup, no limits, 100% free — runs entirely in your browser

Try the Free Readability Checker

SolutionGigs Free Readability Score Checker — paste your text and see your score in seconds. No signup, 100% free.

Frequently Asked Questions

What is the Flesch-Kincaid reading ease score? The Flesch Reading Ease score ranges from 0 to 100. Higher is easier: 60–70 is plain English for most adults; 50–60 is fairly difficult; 30–50 is academic; below 30 is very difficult. Most web content should target 60–70.

What reading level should web content target? For general web content and blog posts, target grade 6–8 (Flesch-Kincaid Grade Level). Marketing copy: grade 5–6. Technical documentation: grade 10–12. News articles: grade 8. Lower grade levels reduce bounce rates.

How do I improve my content's readability score? Use shorter sentences (15–20 words max), prefer common one-syllable words, break paragraphs at 3–4 sentences, use bullet lists for multiple items, and write in active voice. Our checker highlights the hardest sentences to fix first.

Does readability affect SEO rankings? Google does not directly use readability scores as a ranking signal, but readable content reduces bounce rate and increases dwell time — both of which correlate with higher rankings. Readable content also earns more backlinks naturally.

Is the readability score checker free? Yes — paste any text and get an instant Flesch-Kincaid reading ease score, grade level, estimated reading time, sentence count, and specific improvement suggestions. No account needed.

Mohammed Yaseen

Mohammed Yaseen

Founder, SolutionGigs

Mohammed has been building developer tools since 2018 and writes about JSON, JWT, regex, SQL, APIs, and web development utilities. LinkedIn →