How to Check Your Content's Readability Score
Learn how to check readability scores using Flesch-Kincaid, Gunning Fog, and other formulas. Practical steps to measure and improve how easy your content is to read.
You wrote a blog post. It's accurate, well-researched, and covers the topic thoroughly. But nobody reads past the second paragraph.
The problem might not be your ideas. It might be readability. If your content requires too much cognitive effort to parse, readers bounce — regardless of how good the information is.
Readability scores give you an objective measure of how easy your content is to read. Here is how to check yours and what to do with the results.
What Readability Scores Actually Measure
Readability formulas analyze two primary factors: sentence length and word complexity. Longer sentences with multi-syllable words score lower (harder to read). Shorter sentences with simpler words score higher (easier to read).
The most common readability formulas:
| Formula | What It Measures | Target for Web Content |
|---|---|---|
| Flesch Reading Ease | Score 0-100 (higher = easier) | 60-70 for general audiences |
| Flesch-Kincaid Grade Level | US grade level needed to understand | Grade 7-8 for most web content |
| Gunning Fog Index | Years of education needed | 8-10 for business content |
| SMOG Index | Education level for 100% comprehension | Similar to Gunning Fog |
| Coleman-Liau Index | Character-based grade level | Grade 7-9 |
None of these formulas measure meaning, accuracy, or engagement. They measure effort required to decode your sentences. That distinction matters — readable content can still be wrong, and complex content can still be necessary.
Step 1: Establish Your Readability Target
Before checking scores, decide what "good" looks like for your audience and content type.
General guidelines by audience:
- Consumer content (blog posts, marketing pages): Flesch Reading Ease 60-70, Grade Level 6-8
- Business professionals (B2B content, industry reports): Flesch Reading Ease 50-60, Grade Level 8-10
- Technical specialists (developer docs, research): Flesch Reading Ease 30-50, Grade Level 10-14
- Legal/regulatory content: Often Grade 12+ by necessity, but aim to simplify where possible
Write down your target and use it consistently. Without a target, readability scores are just numbers.
Step 2: Check Your Score
There are several ways to check readability, ranging from free tools to integrated review platforms.
Free Online Checkers
Paste your text into a readability checker. These tools run the standard formulas and give you instant scores. They work for spot-checking individual pieces but are not practical for reviewing content at scale.
Built Into Your Writing Tool
Microsoft Word has a readability statistics feature (File > Options > Proofing > Show readability statistics). Google Docs requires an add-on. These give you scores after a spell check but offer limited actionable feedback.
Integrated Review Platforms
Content review platforms that include readability as one criterion among many (brand voice, SEO, accuracy) give you the most useful picture. A readability score in isolation tells you less than a readability score alongside other quality metrics.
Step 3: Interpret the Results
A Flesch Reading Ease score of 45 does not mean your content is bad. It means it requires effort to read. Whether that is a problem depends on your audience and purpose.
When low readability is a problem:
- Your audience is general consumers
- The content explains a concept to beginners
- You are writing marketing copy, email campaigns, or social media
- Users are scanning on mobile devices
When lower readability is acceptable:
- Your audience has domain expertise
- The content requires precise technical terminology
- Legal or regulatory language is mandated
- You are writing for academic or research contexts
The goal is not to make everything read at a sixth-grade level. The goal is to match your readability to your audience's expectations and context.
Step 4: Improve Your Score
If your readability score is below your target, focus on these specific changes:
Shorten Sentences
Sentences over 20 words are harder to parse. Break compound sentences into two. Remove clauses that do not add meaning.
Before (28 words): "The platform provides comprehensive analytics dashboards that enable marketing teams to track content performance metrics across multiple channels in real-time."
After (14 + 10 words): "The platform provides analytics dashboards for marketing teams. Track content performance across multiple channels in real-time."
Replace Complex Words
Multi-syllable words slow readers down. Use simpler alternatives when the meaning is identical.
| Instead of | Use |
|---|---|
| Utilize | Use |
| Implement | Set up |
| Facilitate | Help |
| Methodology | Method |
| Approximately | About |
| Comprehensive | Full, complete |
Break Up Long Paragraphs
Walls of text are intimidating on screens. Keep paragraphs to 3-4 sentences maximum. Use headings, bullet points, and white space to create visual breaks.
Use Active Voice
Passive voice adds words and complexity. "The report was reviewed by the team" becomes "The team reviewed the report." Fewer words, clearer meaning, better readability score.
Step 5: Build Readability Into Your Process
Checking readability after writing is useful. Checking it automatically as part of your review process is better.
Make readability a gate criterion. Set a minimum readability score as one of your content quality checks. Content below the threshold gets specific feedback about which sentences and paragraphs need simplification.
Track readability trends over time. Are your writers improving? Is a particular content type consistently scoring low? Trend data reveals patterns that spot-checking misses.
Create readability guidelines per content type. Your blog posts, help documentation, and email campaigns should each have their own readability targets documented in your content style guide.
Common Readability Mistakes
Oversimplifying Technical Content
Do not dumb down content that needs precision. If your developer documentation requires the word "asynchronous," use it. Readability optimization means removing unnecessary complexity, not removing necessary terminology.
Ignoring Readability for Internal Content
Internal documentation, SOPs, and training materials benefit from readability optimization just as much as external content. If your team cannot easily understand your processes, they cannot follow them.
Checking Once and Forgetting
Readability should be part of your ongoing content quality metrics, not a one-time audit. Build it into your review workflow so every piece of content gets checked before publication.
Key Takeaways
- Readability scores measure how much effort your content requires to read, not how good it is
- Set targets by audience: Grade 6-8 for consumers, Grade 8-10 for business professionals, Grade 10+ for specialists
- Improve scores by shortening sentences, replacing complex words, and using active voice
- Build readability checks into your review process rather than checking manually after the fact
- Track trends over time to identify systematic readability issues across your content
Readability is not about writing for children. It is about respecting your readers' time and cognitive load. Content that is easy to read gets read. Content that is hard to read gets abandoned.