Vocabulary Size Test
gauge your lexical scale. decide if the presented dictionary terms exist in English.
brain & cognitive tests
select a test to begin. test your mental abilities.
test completed!
your final score is calculated below.
remember the number displayed. type it in when it disappears.
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memorize the highlighted tiles. click them once they hide.
watch the pattern flash and repeat the exact sequence in order.
click 'seen' if the word has been shown in this run, otherwise click 'new'.
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solve as many simple arithmetic operations as possible within 60 seconds.
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solve equations that increase in difficulty. no time limits, 3 lives.
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click the square with the slightly different color shade. 30 seconds timer.
does the font ink color match the color word? 30 seconds.
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identify the numbers hidden in the bubble dots. 5 plates total.
identify if the presented word is a real English dictionary term or fake. 20 words.
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type the flashed words as fast as possible. 30 seconds timer.
select the ink color of the word, NOT the color name itself. 30 seconds.
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press MATCH if the letter matches the one shown 2 letters back. Otherwise click NO MATCH.
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click numbers 1 to 25 in ascending order as fast as possible.
complete a 10-question logical progression evaluation to measure your IQ score.
2-minute rapid version. solve as many logical progression puzzles as possible under pressure.
cognitive age estimator. tests memory retrieval and rapid mathematical calculations.
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test deductive reasoning with word puzzles, order relationships, and syllogisms. 5 questions.
combined recall capacity test. evaluates numeric memory, spatial recall, and audio sequence memory.
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Vocabulary Size Test — Estimate Your Lexical Vocabulary Size
Estimate your total English vocabulary size with our free online vocabulary size test. Check your lexical range, compare native vs non-native benchmarks by age, and learn scientific tips to expand your vocabulary.
How the Vocabulary Size Test Works
To estimate your vocabulary size, click the start panel above to activate the diagnostic word list. The test presents a series of words ranging from common everyday vocabulary to rare, obscure academic terms. For each word, you must decide whether it is a real English dictionary word or a fake word. The algorithm uses statistical frequency bands to map the boundaries of your passive vocabulary. Complete the test honestly to get an accurate estimate of your lexical scale.
Average Vocabulary Size by Age
Vocabulary size expands throughout your life as you read, study, and communicate. A native English speaker's vocabulary typically increases by several hundred words each year during childhood, peaking in late middle age. Non-native speakers show different development paths, where their vocabulary size correlates strongly with immersion levels and active practice rather than age alone. The table below outlines average passive word counts for native speakers across different age groups, showing standard learning trajectories.
Vocabulary Size Benchmarks
| Age Bracket | Average Native Vocabulary | Advanced / Academic Vocabulary |
|---|---|---|
| 10 - 15 years | 12,000 - 18,000 words | 20,000+ words |
| 16 - 22 years | 20,000 - 28,000 words | 32,000+ words |
| 23 - 50 years | 30,000 - 35,000 words | 40,000+ words |
| 51+ years | 35,000 - 45,000 words | 48,000+ words |
What Is a Good Score?
A good score for a native English speaker is knowing between 25,000 and 35,000 words, which is the average range for most college-educated adults. For non-native English speakers, a vocabulary size above 15,000 words is excellent, indicating strong professional fluency. Review the benchmark guidelines to see how your word count ranks compared to global standards. Higher scores correlate with advanced reading comprehension skills.
How to Improve Your Vocabulary
To expand your lexical range and learn new English words systematically, implement these five tips: - Tip 1: Read a diverse selection of books, newspapers, and academic journals daily to expose yourself to new terms. - Tip 2: Use a word-a-day calendar or app to learn and write one new word every morning. - Tip 3: Learn new words in context rather than memorizing isolated lists to improve long-term retention. - Tip 4: Keep a personal vocabulary journal to write down and review unfamiliar words you find while reading. - Tip 5: Play word games like Scrabble or crosswords to practice retrieving words from your memory.
Frequently Asked Questions
How does the vocabulary size test estimate my word count?
The test uses statistical sampling across different word frequency bands based on standard English corpus databases. By checking if you recognize words at various difficulty levels, the algorithm maps where your comprehension begins to fade. It then extrapolates this threshold to estimate your total passive vocabulary size. This scientific method provides a highly reliable approximation within minutes.
What is the difference between active and passive vocabulary?
Active vocabulary consists of words you use regularly when speaking or writing in daily communication. Passive vocabulary includes words you understand when you hear or read them, but rarely use yourself. Your passive vocabulary is always much larger than your active vocabulary, often by double the amount. This test measures your passive vocabulary size, reflecting your reading comprehension limits.
How many words does a non-native speaker need for fluency?
A non-native English speaker needs a vocabulary of about 3,000 to 5,000 words for basic everyday conversation. For professional or academic environments, a vocabulary size of 8,000 to 12,000 words is recommended to understand complex texts. Reaching 15,000 words indicates advanced fluency, allowing for smooth communication. Continuous reading is the best way to bridge this lexical gap.
Can my vocabulary size decrease as I get older?
Unlike processing speed or short-term memory, vocabulary size is part of crystallized intelligence and generally increases or remains stable as you age. It only decreases if you stop reading, speaking, or engaging in mentally stimulating activities. Rare words can fade from memory if they are not encountered for many years. Staying curious and reading daily preserves your verbal database.
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