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Vocabulary Richness
Measure the type token ratio of a text, count hapax legomena and unique words, and compare the result with a plain band.
Vocabulary richness
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How to use the Vocabulary Richness
- Paste the text whose vocabulary you want to measure.
- Choose the shortest counted word and how case and numbers are treated.
- Read the type token ratio, the hapax count and the comparison band.
Features
- Type token ratio with three decimal places
- Hapax legomena count for words used once
- Unique word count and repeat rate
- Comparison band from repetitive to rich
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Frequently Asked Questions
Common questions about the free online vocabulary richness.
It divides the number of unique words, called types, by the total number of running words,
called tokens. Higher values mean a more varied vocabulary.
Hapax legomena are words that appear exactly once in the text. A high count usually signals
varied, carefully chosen vocabulary.
Longer texts tend to reuse common words, so the ratio drops even when the writing is good.
Compare texts of similar length for a fair reading.
For a few hundred words, 0.5 to 0.7 is healthy. Below 0.4 usually means the text repeats
itself a lot, above 0.7 is very varied.
It is the share of tokens that are not new, worked out as one minus the type token ratio,
shown as a percentage.
That depends on your text. Count them when the numbers carry meaning, and leave them out for
prose where digits are incidental.
No. Every word is counted locally in your browser, so your text never leaves your device.
Yes. The checker is fully responsive and works in any modern browser on desktop, tablet and
phone.
Yes. The vocabulary richness checker is completely free, with no account, no sign-up and no
usage limits.
Last updated: October 10, 2026