Lexical Diversity Index Calculator
Calculate type-token ratio for lexical diversity
About this calculator
The Lexical Diversity Index Calculator measures the type-token ratio (TTR) of text, indicating vocabulary richness and diversity. This tool analyzes the relationship between unique words (types) and total words (tokens) to provide insights into writing complexity and linguistic sophistication. It's essential for researchers, educators, writers, and language analysts who need to evaluate text quality, assess vocabulary development, or compare linguistic diversity across different texts and authors.
How to use
Input your text into the calculator field, then click calculate to analyze lexical diversity. The tool will count total words (tokens) and unique words (types), then compute the type-token ratio by dividing types by tokens. Higher ratios indicate greater vocabulary diversity and linguistic richness.
Frequently asked questions
What is a good type-token ratio?
Generally, ratios above 0.5 indicate diverse vocabulary, while ratios below 0.3 suggest repetitive language. Context and text length matter significantly.
How does text length affect TTR?
Longer texts typically have lower TTR values as word repetition increases naturally with length, making comparison challenging across different text sizes.
What applications use lexical diversity analysis?
Educational assessment, linguistic research, writing quality evaluation, language learning progress tracking, and comparative literature analysis commonly utilize lexical diversity measurements.