Readability Checker — Flesch Score, Grade Level & Sentences
Find out how hard your text is to read — Flesch Reading Ease score, grade level, and the metrics behind it.
Readability Checker
Flesch Reading Ease + grade level — instant
How to check readability (3 steps)
- Paste your text. An article, a product page, an email — the whole thing, not a sample.
- Read the score. The Flesch Reading Ease number (0–100) plus a plain-English label and an approximate US grade level. The formula is
206.835 − 1.015×(words ÷ sentences) − 84.6×(syllables ÷ words). - Fix the two levers. If the score is low, it is almost always caused by long sentences or multi-syllable words. The grid below tells you which one — shorten sentences under ~20 words, and swap complex words for simpler ones where you can.
Interpreting the score
90–100 = very easy (grade 5, children's books). 60–70 = standard, plain English (grade 7–8 — what Wikipedia and most successful web content aim for). 30–50 = difficult (college level). 0–30 = very difficult (academic papers). For money pages and blog posts, 60–70 is the target: readable by everyone without sounding childish.
Why it matters for SEO
Search engines do not score readability directly, but people do. Harder text gets abandoned faster, which raises bounce rate and shortens dwell time — both signals Google notices. Readable content also gets shared, linked and cited more. It is the most overlooked on-page lever there is.
Who needs this
Bloggers before publishing, copywriters testing drafts, teachers writing at a level, and anyone localising content for a wider audience.
FAQ
- How accurate is the syllable count? It is a standard heuristic (vowel-group counting). Irregular words occasionally shift the score by a point or two — the trend is reliable even when the exact number is not.
- What score does a good blog post get? Typically 60–70. Below 50, expect readers to drop off quickly.
- Is my text uploaded? No — the analysis runs entirely in your browser.