Readability Checker & Flesch-Kincaid Score Calculator
Audit reading ease, grade level, sentence complexity, and syllable count of your written copy
Flesch Reading Ease
57.1 / 100
Fairly Difficult (10th-12th Grade - High School)
Higher scores indicate text that is easier to read. Web content and general copy perform best between 60 and 80.
Flesch-Kincaid Grade
Grade 8.4
US school grade level required to comprehend.
Gunning Fog Index
9.5
Formal education years needed for easy reading.
Coleman-Liau Index
12.9
Calculated based on character & sentence length.
Automated Readability (ARI)
9.8
Age/grade benchmark for computer-evaluated text.
Text Structure & Statistics
63
Words
5
Sentences
333
Characters
102
Syllables
0.3 min
Reading Time
0.5 min
Speaking Time
Why Readability Matters for SEO and Readers
Clear, accessible writing is a proven ranking factor in modern search engines. When readers encounter dense, convoluted text, bounce rates spike and dwell time plummets. Search algorithms, including Google's helpful content updates, favor clear prose that directly answers user queries without unnecessary academic friction.
Understanding Readability Formulas
- Flesch Reading Ease: Scores from 0 to 100. A score of 60 to 70 is standard conversational English, recommended for articles, landing pages, and commercial web copy.
- Flesch-Kincaid Grade Level: Translates reading difficulty into United States school grade levels (e.g., Grade 8.0 corresponds to an 8th-grade reading standard).
- Gunning Fog Index: Evaluates years of formal education required to understand text on the first reading, emphasizing polysyllabic complex words.
- Coleman-Liau & ARI: Automated indices evaluating character density and average sentence length.