Skip to content
Redmoon Calculators
텍스트 분석 All languages

Lexical Diversity (TTR) Calculator

Type‑Token Ratio plus MATTR moving average — see how much your vocabulary repeats.

0 chars

작동 방식

Type-token ratio (TTR) is the simplest measure of vocabulary variety: unique words / total words.

Because TTR drops as text gets longer, this tool also computes the Moving Average Type-Token Ratio (MATTR) over a 50-word window, which is length-invariant.

You also get a list of "hapax legomena" — words that appear exactly once.

공식

자주 묻는 질문

What is type-token ratio (TTR)?

The ratio of unique words to total words. TTR drops as text gets longer, so it's sensitive to length.

What is MATTR?

Moving Average Type-Token Ratio. It computes TTR over a sliding window (we use 50 words) so the score is comparable across documents of different lengths.

Related tools

피드백 보내기

모든 메시지를 읽습니다. 무엇을 개선하면 좋을지, 좋았던 점은 무엇인지 알려주세요.