English Vocabulary Size Test

Stop Guessing. Measure Your Vocabulary now.
Have you ever wondered how large your English vocabulary is? Can we accurately measure it? At Lingedia, we’ve developed this test to answer that question. By analyzing data from thousands of native and non-native English speakers, we’ve uncovered some exciting insights.
How it works: The Adaptive Algorithm.
Lingedia’s vocabulary size test is dynamic. We test you against the 19,300 most frequent word families (head words) in English. The difficulty adapts to you in real-time to find your exact baseline.
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Word Selection:
- We have created a list of the 19,300 most commonly used head words. These words are ordered by their frequency of use in the language, ensuring you are tested on words that actually matter.
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Adaptive Algorithm:
- As you progress through the test, our algorithm dynamically adjusts the difficulty level. Your answers influence the next word presented, if you answer correctly, the challenge increases; if not, it becomes more manageable.
Test Accuracy
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Answer Honestly:
- Only click “Yes” to mark a word as “known” if you genuinely understand the meaning. Avoid guessing.
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Repeat the Test:
- For the most accurate assessment, take the test multiple times and average your results.
How Do You Compare to Native Speakers?
Based on data from thousands of Lingedia users, here is how vocabulary size typically correlates with education level.
| Study Level | Native Speakers | Non-Native Learners |
|---|---|---|
| High School | 14,100 | 7,100 |
| Bachelor’s Degree | 15,700 | 8,900 |
| Master’s Degree | 16,400 | 10,900 |
| PhD | 16,800 (Peak) | 11,800 (Peak) |
* Data based on Lingedia user results.
The Science of Vocabulary Retention
Knowing your vocabulary size is just the first step. The challenge is retaining new words. Studies show that without review, learners forget 80% of new vocabulary within 48 hours.
Lingedia solves this with Automated Spaced Repetition (SRS). Unlike manual flashcards, our app analyzes your learning curve and schedules reviews at the exact moment you are likely to forget. Whether you are using our Immersive Reader to translate web pages or our Shadowing tools to improve pronunciation, every word is tracked to ensure long-term retention.