📖 Readability Score Checker

Flesch Reading Ease scores text on a 0–100 scale. Higher scores mean easier to read. 90–100 is very easy (5th grade level), 60–70 is standard (8th–9th grade), 30–50 is difficult (college level), 0–30 is very difficult (professional or academic). Most web content should target 60–70 for broad audiences. Blog posts aimed at general business professionals do well at 50–60.

For most B2B SaaS content, target 7th–9th grade (Flesch-Kincaid Grade Level 7–9, Flesch Reading Ease 60–70). This isn't dumbing down — it's clarity. Even expert readers prefer concise, plain language. Landing pages should be even simpler (Grade 6–7). Long-form technical posts can go higher (Grade 10–12) but avoid academic-level complexity unless your audience is researchers.

The Gunning Fog Index estimates the years of formal education needed to understand a text on first reading. A score of 12 means a high school senior can read it comfortably. Most popular writing scores below 12. Business writing should aim for 10–12. Academic and legal documents often score 15–20+. For blog content, aim for 8–12. The Fog Index penalizes polysyllabic words (3+ syllables) heavily — a key driver for making your writing clearer.

Yes, indirectly but significantly. Google measures engagement signals — bounce rate, time on page, scroll depth — which are all affected by readability. Hard-to-read content drives users away. Additionally, readable content earns more backlinks and social shares. Google's own documentation on helpful content emphasizes writing for humans, not algorithms. Content that reads well at Grade 7–9 level consistently outperforms over-complex writing in SaaS SEO.

Both use the same inputs (sentence length and syllable count per word) but apply different formulas and produce inversed scales. Flesch Reading Ease: higher = easier (90+ for children's books, 30 for college-level text). Flesch-Kincaid Grade Level: lower = easier (6th grade for easy content, 16+ for academic papers). A Grade 8 Flesch-Kincaid score roughly corresponds to a 60–70 Flesch Reading Ease score. Use both together for a complete readability picture.

In the Gunning Fog Index, words with 3 or more syllables (polysyllabic words) count as complex. In Flesch-Kincaid formulas, the average syllable count per word is used. Common polysyllabic words to watch: 'implementation' (5 syllables), 'optimization' (5), 'organization' (5). Replace them with shorter synonyms where possible: 'rollout', 'improve', 'company'. Reducing complex word count is one of the fastest ways to improve your readability score.