Readable Text Wins — in Class and in Google
Readability is not about dumbing content down; it is about matching your reader. Google's quality raters are trained to assess how easily a page communicates, and studies of ranking behavior repeatedly associate clear, moderately short sentences with better engagement — longer dwell time, lower bounce. The classic formulas quantify that clarity with one number, and each answers a slightly different question. Our Readability Checker runs all five formulas at once, so you get the consensus view instead of a single formula's opinion.
The Five Scores, in Plain Language
- Flesch Reading Ease (0–100) — higher is easier. 60+ suits general web audiences; 70+ is a good target for marketing pages.
- Flesch-Kincaid Grade — maps to US school grade level. A score of 8 means an eighth-grader can follow it.
- Gunning Fog — years of education needed; penalizes complex words (3+ syllables) heavily.
- SMOG — the healthcare-industry standard, built on polysyllable counts; conservative and widely cited.
- Coleman-Liau — relies on characters per word instead of syllables, which makes it more stable for machine-processed text.
The Error Most Writers Make
The single biggest readability killer is the overlong sentence. When your average sentence climbs past 25 words, every formula above punishes the text — and real readers skim or leave. That is why this tool does not just show scores: it lists your exact sentences over 25 words so you can split them first. One round of splitting typically moves Flesch Reading Ease by 10–20 points, which is usually the difference between "difficult" and "standard". After splitting, polish the leftovers with the Text Cleaner and confirm length limits with the Text Counter.
How the Formulas Work
All five formulas combine the same ingredients in different ratios: sentence length (words per sentence) and word difficulty (syllables or characters per word). Syllables are estimated with the standard heuristic — vowel-group counting with silent-e and suffix adjustments — the same approach used by classic readability software. The formulas are computed locally in JavaScript as you type; nothing is uploaded and no AI rewrites your text. You keep full control of every word.
Who Should Care
- Content writers and SEOs — match search intent with text that is easy to scan and read.
- Students and academics — verify essays meet the required level without overshooting into pompous prose.
- HR and communications teams — keep policies and announcements comprehensible for everyone.
- Developers writing docs — documentation that reads easily gets fewer support tickets.