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LIX Readability Calculator
Measure text readability using the Swedish LIX (Läsbarhetsindex) formula - The higher your LIX number, the more difficult your text is to read
What is LIX?
LIX is a readability measure - the higher your LIX number, the more difficult your text is to read. LIX is short for läsbarhetsindex, which is a Swedish method referring to the difficulty of reading a specific text. LIX is intended as a readability measure indicating the difficulty of texts.
The LIX Formula
LIX = (A ÷ B) + (C × 100 ÷ A)
A
Number of words in the text
B
Number of periods (sentences defined by period, colon or capital first letter)
C
Number of long words (6+ letters)
LIX Score Interpretation
Under 25: Very Easy
25-35: Easy
35-45: Medium
45-55: Difficult
Over 55: Very Difficult
Why LIX Matters
Created by Swedish scholar Carl-Hugo Björnsson in 1968, LIX provides objective readability assessment that works across multiple languages.
- Language-independent formula
- Simple letter counting vs syllable counting
- Proven accuracy across text types
Key Benefits
LIX helps writers, educators, and marketers optimize their content for target audiences.
- Improve content accessibility
- Match reading level to audience
- Enhance communication effectiveness
How to Use LIX
Paste your text below to get instant readability analysis with actionable insights.
- Analyze before publishing
- Compare different versions
- Monitor content complexity
Why Use LIX Readability Analysis?
Content Marketing
Ensure your blog posts, social media content, and marketing materials match your audience's reading level for better engagement and conversion rates.
Educational Materials
Create learning content that's appropriately challenging for your students without overwhelming them with overly complex language.
Business Communication
Write clearer emails, reports, and documentation that your colleagues and clients can easily understand and act upon.
Web Accessibility
Improve your website's accessibility by ensuring text content is readable by diverse audiences, including non-native speakers.