Readability Checker
Score your content with the Flesch-Kincaid formula. Aim for 60+ for general web audiences — results update live as you type.
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Readability Guide
How readability impacts your SEO & conversions
Readability measures how easy your content is to understand. The Flesch-Kincaid Reading Ease score (0–100) is the industry standard — the higher the score, the easier the read. Google cares about readability because hard-to-read content drives readers away.
What is Flesch-Kincaid?
The Flesch Reading Ease formula was developed in 1948 by Rudolf Flesch and is still the gold standard for readability testing. It analyzes average sentence length and average syllables per word to produce a 0–100 score.
Score ranges explained
90–100: Very easy (5th grade). 70–80: Easy (7th grade). 60–70: Standard (8–9th grade). 50–60: Fairly difficult. 30–50: Difficult. 0–30: Very confusing (college level).
Why 60+ for the web?
The average US adult reads at a 7th–8th grade level. A score of 60–70 hits that sweet spot — accessible to the widest audience without feeling condescending.
Readability and bounce rate
Hard-to-read pages lose readers in the first 30 seconds. Lower bounce rate and higher time-on-page are indirect ranking signals. Clear writing keeps readers engaged.
Grade level vs. reading ease
Our tool also reports Flesch-Kincaid Grade Level — the US school grade equivalent. Aim for Grade 6–9 for general audiences. Technical documentation may acceptably run Grade 12+.
How to improve your score
Two changes have the biggest impact: shorten sentences (split anything over 25 words) and replace multi-syllable words with simpler alternatives (utilize → use, implement → add).
Pro Tips
60–70 for blog posts and landing pages. 50–60 is acceptable for technical B2B content. Below 50 means your audience will struggle — rewrite.
Split every sentence over 25 words into two. This single change often raises your score by 10+ points.
utilize → use · commence → start · endeavor → try · in order to → to · due to the fact that → because
Frequently Asked Questions
- What is a good Flesch readability score for SEO?
- For most web content targeting general audiences, aim for 60–70 (Standard, 8th–9th grade). Blog posts, landing pages, and product descriptions benefit most from hitting this range. For expert or technical audiences, 50–60 is acceptable. Scores below 50 risk losing most web readers.
- Does Google use readability scores as a ranking factor?
- Google doesn't directly use Flesch-Kincaid as a ranking signal. However, readability strongly influences user behavior metrics — time on page, bounce rate, pages per session — which are indirect ranking signals. Well-written, easy-to-read content earns more backlinks and social shares too.
- How much text do I need for an accurate score?
- For statistically reliable results, you need at least 100 words (ideally 300+). Very short texts produce erratic scores because a single long sentence dominates the average. Paste your full page content for the most meaningful reading.
- Why is my score low even though my writing doesn't feel hard?
- Long sentences are the most common cause of low scores — even one 40-word sentence can drag your average down significantly. Check your sentence counter and look for any sentence over 25 words. Also check for multi-syllable jargon that could be replaced with simpler words.