For most web and blog content, a Flesch Reading Ease score of 60–70 is the target — corresponding to an 8th–9th grade level, readable by the broad adult population. Email and consumer content typically aims for 65–75. Academic and professional content typically falls in the 30–50 range.
The Flesch Reading Ease formula has been around since 1948, but it's more relevant than ever in an era when content marketing teams, SEO tools, and content management systems routinely surface readability scores. The question is: what does the number actually mean, and what should you aim for?
The short answer is that it depends on your audience. A 9th-grade reading level that's "too complex" for a consumer health blog is entirely appropriate for a corporate legal brief. The table below is your reference for what score to target based on content type.
Scores range from 0 to 100. Higher scores mean the text is easier to read. The scale was calibrated so that a score of 60–70 represents "plain English" — the kind of writing found in mainstream news publications and standard consumer-facing content.
| Score | Level | Grade equivalent | Example | Verdict for web |
|---|---|---|---|---|
| 90–100 | Very Easy | 5th grade | Children's books, text messages | Excellent |
| 80–90 | Easy | 6th grade | Reader's Digest, newsletters | Excellent |
| 70–80 | Fairly Easy | 7th grade | Most blog posts, how-to guides | Very Good |
| 60–70 | Standard | 8th–9th grade | BBC News, plain English journalism | Target zone |
| 50–60 | Fairly Difficult | 10th–12th grade | Time Magazine, business writing | Acceptable |
| 30–50 | Difficult | College level | Harvard Business Review, legal docs | Context-dependent |
| 0–30 | Very Difficult | Professional | Academic journals, contracts | Too complex for general web |
The Flesch Reading Ease score uses two inputs: average sentence length (ASL) and average number of syllables per word (ASW). Both make text harder to read as they increase.
ASL = average sentence length (words) and ASW = average syllables per wordPractical takeaway: the two levers are sentence length and word complexity. Cutting a 30-word sentence into two 15-word sentences will raise your score more than replacing a 3-syllable word with a 2-syllable alternative.
| Content type | Target Flesch Reading Ease | Target FK Grade Level | Notes |
|---|---|---|---|
| Blog / web content (general) | 60–70 | 7–9 | The most commonly recommended range for SEO and user engagement |
| Email marketing / newsletters | 65–75 | 6–8 | Plain, direct language improves click-through rates |
| Consumer product descriptions | 70–80 | 6–7 | Short sentences and familiar words build confidence |
| Healthcare / patient materials | 60–70 | 6–8 | US federal guidelines suggest 6th–8th grade for patient-facing content |
| Business writing / reports | 50–65 | 8–12 | Audience has professional vocabulary; some complexity is appropriate |
| Legal documents (client-facing) | 40–55 | 10–14 | Plain language initiatives push legal writing simpler than historical norms |
| Academic research papers | 20–40 | 14–18 | Specialist audience expects technical precision over plain language |
Sentence length is the single strongest driver of readability scores. Aim for an average of 15–20 words per sentence. Break compound sentences at conjunctions like "and," "but," and "because."
Every extra syllable adds complexity. "Use" instead of "utilize," "help" instead of "facilitate," "show" instead of "demonstrate." One-syllable swaps add up fast.
Active constructions are shorter and more direct. "The team completed the analysis" (5 words) vs. "The analysis was completed by the team" (7 words). Active voice also tends to use more concrete verbs.
"Very," "quite," "rather," "somewhat," "essentially" — these words add syllables and length without adding meaning. Removing them tightens the prose and raises the score.
Paste your article or draft into the calculator and get a Flesch Reading Ease score and grade level instantly — with audience-specific benchmarks.
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