Free Writing Tool

Readability Score Checker — 6 Scores in One Click

Paste your text and this free Readability Score Checker calculates Flesch, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, and ARI scores, plus flags long sentences, passive voice, and complex words you should rewrite.

Your Text
Readability Report

Paste text on the left and click Analyze Readability to see Flesch, Gunning Fog, SMOG, and 3 more scores.

Word count, sentences, syllables, and reading-time stats will appear here.

Long sentences, passive voice, and complex words will be highlighted here.

Why Readability Matters More Than Word Count

Most bloggers obsess over word count. They have read somewhere that "long-form content ranks better" and now their first instinct is to pad. A 600-word answer becomes 2,400 words of throat-clearing, repetition, and fluff. The reader bounces in 30 seconds and Google notices.

What those bloggers should be measuring instead is readability. How easy is the article to actually read? How long are the sentences? How many syllables are in the average word? Is the reader getting answers, or wading through a swamp of jargon?

What the Scores Actually Mean

The Flesch Reading Ease score runs from 0 to 100. Higher is easier. Most blog content should land between 60 and 80. The New York Times averages around 65. Hemingway's prose comes in around 90. Academic papers sit closer to 30, which is why most academic papers are unreadable to a normal audience.

The Flesch-Kincaid Grade Level converts that to a US school grade. A score of 8 means an 8th grader can read it. For mass-audience blogs, target 7 to 9. For technical writing, 11 to 13 is fine. Anything above 14 means you are losing readers who do not have the patience or background to push through.

The Three Issues That Wreck Readability

Readability scores are mostly driven by three things. Sentence length: every sentence over 25 words drops your score. Word complexity: words with 3 or more syllables are flagged as "complex" and they pile up fast in jargon-heavy writing. Passive voice: not a formula input, but a strong correlate of weak writing in general.

Cut sentence length first. It is the highest-leverage change you can make. Take any 35-word sentence and split it into two 17-word sentences. The information stays the same, but the score jumps. The reader gets a breath. The page feels lighter.

How I Use This Tool

I run every article through this checker before publishing. Not because I worship the scores, but because the issue lists are useful. The "Long Sentences" tab flags the worst offenders. I rewrite those. The "Passive Voice" tab catches the wishy-washy passive constructions I always slip into when I am tired. The "Complex Words" tab shows me where I am using a 12-syllable phrase when a simple word would do.

Twenty minutes of editing based on this report turns a fine article into a strong one. Not by adding words. By cutting and rewriting until the readability scores sit in the right range.

Why Google Cares

Google does not directly measure readability the way this tool does. But it measures every behaviour that readability influences. Time on page. Scroll depth. Bounce rate. Pogo-sticking back to search results. All of those go up when content is hard to read. All of them go down when content flows.

So while readability is not a direct ranking factor, it is the foundation of every behavioural metric Google uses to evaluate content quality. Improve readability and you improve the metrics that actually drive rankings.

The Audience Adjustment

One important caveat. Readability targets vary by audience. A finance blog targeting institutional investors does not need a Flesch score of 80. Their audience expects technical density. They would find aggressively simple writing condescending.

A parenting blog or a recipe site is the opposite. Those readers want short sentences and zero jargon. The audience selector in this tool adjusts the target ranges so you are comparing your scores against the right benchmark.

One Last Thing

Do not chase the highest possible score. Flesch 95 sounds great until you read the actual prose and realise it sounds like a children's book. The goal is not the absolute highest readability. The goal is matching your readability to your audience and topic.

Run the article. Read the issues. Fix the worst offenders. Re-run. Stop when the scores are in your target range. That is the workflow that turns readability from a vanity metric into something that actually improves your writing.

Want help making your content easier to read and rank?

I help bloggers and small business owners audit underperforming pages, simplify dense writing, and rewrite for both readers and search engines without losing your voice.

Readability Score Checker – FAQs

Common questions about readability formulas, scoring, and using this tool to improve your writing.

What is a good Flesch Reading Ease score?

For general blog content, aim for 60 to 80. Below 50 is hard to read for most audiences. Above 80 is very simple — fine for children's content but can feel patronising for adults. The "Plain English" sweet spot is 60 to 70.

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

They use the same inputs (sentence length and syllables per word) but express the result differently. Reading Ease is a 0–100 score (higher = easier). Grade Level converts that to a US school grade (lower = easier). They tell you the same thing in two formats.

Why does this tool give 6 different scores?

Each formula weighs things slightly differently — some focus on sentence length, others on syllable count or character count. When 5 of the 6 formulas agree on a grade level, you can trust the result. When they disagree, the average is usually a fair representation.

What counts as a "complex word"?

In readability formulas, a complex word is any word with 3 or more syllables, with a few exceptions: proper nouns, common verb endings (-ing, -ed, -es), and compound words. The Gunning Fog and SMOG formulas both rely heavily on complex word counts.

How accurate is the passive voice detection?

It uses a simple heuristic — looking for "be" verbs followed by past participles. It catches most clear passive constructions but can miss complex cases or false-flag some active sentences. Treat it as a guide, not a verdict.

Should I aim for the highest readability score possible?

No. Match readability to your audience. Technical or B2B content can score lower (more complex language) and still be appropriate. Mass-audience content (lifestyle, parenting, food) should score higher. Use the audience selector to set the right target.

Does Google use these scores as a ranking factor?

Not directly. Google does not measure Flesch scores. But Google measures user behaviour (time on page, bounce rate, scroll depth) that is heavily influenced by readability. Better readability indirectly improves rankings through better engagement signals.

How long should sentences be?

Aim for an average of 15 to 20 words per sentence. Anything over 25 words gets harder for readers to follow. Vary length — mix shorter sentences in for emphasis. A page full of 20-word sentences feels monotonous.

Can I check non-English text?

The formulas are designed for English and the syllable counter uses English heuristics. Other languages will produce inaccurate scores. For non-English content, use language-specific readability tools.

How much text do I need for accurate scores?

At least 100 words for reasonably reliable scores. Below 100 words, sentence structure variations have too much weight on the result. SMOG specifically requires at least 30 sentences for full accuracy, but smaller samples still give a useful directional reading.