Unique Word Counter — Free Online Tool
Last updated: January 2025
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What is Unique Word Counter?
Unique Word Counter counts how many distinct words appear in your text and calculates your vocabulary richness score.
When to use Unique Word Counter?
Use it to analyze vocabulary diversity in essays, check for repetitive writing, and assess content originality.
How to use this tool
- 1Paste your text in the input area
- 2Click 'Analyze' to count unique words
- 3View unique word count and vocabulary richness percentage
Examples
| Input | Output |
|---|---|
| The cat sat on the mat. | 5 unique words (the, cat, sat, on, mat) | Richness: 83% |
| (1000-word article) | Typically 400-600 unique words | Richness: 40-60% |
| (Academic paper) | High unique word count indicates diverse vocabulary |
| (Marketing copy) | Low richness may indicate repetitive messaging |
| (Novel chapter) | Unique word rate shows writing style diversity |
Rules & Behavior
- Words compared case-insensitively
- Richness = unique words / total words × 100%
- Higher richness generally indicates greater vocabulary diversity
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Frequently Asked Questions
What is vocabulary richness?
Vocabulary richness (Type-Token Ratio) measures what percentage of your total words are unique. Higher percentages indicate more diverse vocabulary use.
What is a good vocabulary richness score?
In general writing, 40-60% is typical. Academic and literary writing often achieves 50-70%. Content that repeats key terms may score lower (20-40%), which can be intentional for SEO.
Does it count plurals as different words?
Yes, 'cat' and 'cats' are counted as separate unique words since we do simple string comparison, not lemmatization.
Can I see the full list of unique words?
Yes, our tool displays the complete sorted list of unique words found in your text.
Should I aim for high vocabulary richness?
It depends on context. SEO content benefits from keyword repetition (lower richness). Literary or academic writing benefits from vocabulary diversity (higher richness).