You can have the best information in the world, but if your sentences are long, tangled and full of heavy words, most readers will leave before they reach it. Readability scores give you an objective measure of how easy your text is to understand. Our free readability checker analyses your writing with the respected Flesch Reading Ease and Flesch-Kincaid Grade Level formulas, then shows the supporting statistics behind them: average sentence length, average syllables per word, and the longest sentences that deserve a second look.
Quick Answer: Paste at least a paragraph of text and the readability checker returns Flesch Reading Ease (0 to 100) and a US school grade level, plus sentence and syllable statistics to help you simplify your writing.
Free Online Tool
Readability Checker
Flesch Reading Ease and Grade Level for your writing.
How to Use the Readability Checker
- Copy a representative chunk of your content; a few hundred words gives the most reliable score.
- Paste it into the box and press Analyse Readability (short samples update automatically).
- Read your Flesch Reading Ease score: 60 to 70 is plain English, 70 to 80 is fairly easy, below 50 is difficult.
- Check the grade level: most web content performs best written at roughly grade 7 to 9.
- Use the statistics to fix problems: shorten the longest sentences and replace heavy words, then re-check your score.
Key Features
- Flesch Reading Ease and Flesch-Kincaid Grade Level calculated with the standard published formulas.
- Supporting statistics: words, sentences, syllables, average sentence length and average syllables per word.
- A plain-English interpretation of your score, from ‘very easy’ to ‘very difficult’.
- Highlights the longest sentence in your text so you know exactly what to simplify first.
- Private, instant analysis in your browser with no uploads or accounts.
Best Practices and Tips
- Aim for an average sentence length under 20 words; mix short punchy sentences with longer ones for rhythm.
- Swap multi-syllable words for shorter equivalents where meaning allows: ‘utilise’ becomes ‘use’, ‘approximately’ becomes ‘about’.
- Break walls of text with subheadings, bullets and short paragraphs; layout improves real readability beyond the score.
- Read your text aloud: anywhere you stumble or run out of breath is a sentence your readers will struggle with too.
Common Mistakes to Avoid
- Chasing a perfect score by chopping every sentence into fragments, which makes writing feel robotic and childish.
- Testing only your introduction; check several sections, because readability often drops in technical middle sections.
- Assuming a good score means good content: the formulas measure surface difficulty, not accuracy, structure or value.
Frequently Asked Questions
What is a good Flesch Reading Ease score for a blog?
For general web audiences, 60 to 80 is the sweet spot: text feels clear and conversational without being simplistic. Major news sites average around 60 to 65, while academic papers often fall below 30.
What does the grade level mean?
The Flesch-Kincaid Grade Level estimates the US school grade a reader needs to understand the text comfortably. Grade 8 means an average 13 to 14 year old can follow it, which is the level most content guidelines recommend.
How are syllables counted?
The checker uses a vowel-group algorithm: it counts groups of vowels in each word and applies common rules for silent endings. It is an estimate, but it matches standard readability tools closely enough for editing decisions.
Can I check readability for very short text?
You can, but scores on a sentence or two are unstable because one long word swings the result. For reliable guidance, test at least 100 to 200 words at a time.
Does readability affect SEO?
Search engines do not publish readability as a direct ranking factor, but readable content keeps visitors engaged longer, earns more shares and links, and matches the clear answers search features prefer to quote. Those effects indirectly support rankings.
Related Tools
- Word Counter – count words, characters, sentences and reading time in any text
- Keyword Density Checker – measure how often keywords and phrases appear in your content
- Character Counter – count characters with spaces, without spaces and letters only
- Word Frequency Counter – count how often every word appears in a text, with percentages