I was surprised how accurate it felt. The adaptive questions really found my level, and the vocabulary estimate matched my practice tests.
How big is your English vocabulary?
This adaptive test adjusts to your knowledge level. Start with intermediate words, and the difficulty changes based on your answers. Answer 30 questions to estimate your vocabulary size — from beginner to expert.
This is an estimated vocabulary assessment for educational and entertainment purposes. Results are approximate.
The Test
30 adaptive questions to estimate your vocabulary.
The test starts at an intermediate level. Each correct answer increases difficulty; each wrong answer makes it easier. After 30 questions, we estimate your vocabulary size with a precision of ±500 words.
How It Works
Adaptive testing, accurate results.
Our adaptive algorithm selects words from 5 difficulty pools — beginner, elementary, intermediate, advanced, and expert. The test dynamically adjusts to find your true vocabulary level, giving you a personalized estimate.
Your Result
Your vocabulary estimate is ready.
Based on your answers across 30 adaptive questions, you'll receive an estimated vocabulary size, your proficiency level, and a detailed description of what you can understand and express at your level.
Testimonials
What learners say.
The test adapts to you, not the other way around. I started strong but the advanced words definitely humbled me!
I thought I knew more words than I actually do! The expert-level pool was challenging but fair. Great reality check.
Took this before my IELTS prep. The vocabulary estimate helped me focus my study on the right areas. Really useful.
English vocabulary guide
How big is your English vocabulary?
This adaptive test adjusts to your knowledge level. Start with intermediate words, and the difficulty changes based on your answers. Answer 30 questions to estimate your vocabulary size.
How the test works
You will answer 30 multiple-choice questions. Each question shows an English word with four possible definitions. Choose the correct definition. The adaptive algorithm adjusts difficulty based on your answers. After 30 questions, we calculate your estimated vocabulary size.
Adaptive difficulty
The test starts at intermediate level. When you answer correctly, the next question is harder. When you answer incorrectly, it becomes easier. This ensures the test accurately measures your vocabulary level in just 30 questions.
Understanding your result
Your result includes an estimated vocabulary size, a proficiency level (beginner to expert), and your accuracy percentage. Use this to track your English learning progress over time.
FAQ
How accurate is the vocabulary estimate?
The estimate has a precision of approximately ±500 words. It is based on an IRT-inspired adaptive algorithm that adjusts to your ability level. For a more precise measurement, take the test multiple times.
How many words are in the question bank?
The test draws from a bank of 60 words organized into 5 difficulty pools: beginner, elementary, intermediate, advanced, and expert. Each pool contains 12 carefully selected words.
Can I take the test more than once?
Yes! You can retake the test as many times as you like. The adaptive algorithm will select different questions based on the difficulty level you reach.
How does the scoring work?
The test uses an adaptive difficulty algorithm (IRT-inspired). It starts at intermediate level. After each answer, your difficulty score adjusts: correct answers increase it, wrong answers decrease it. The adjustment speed is 0.5. After 30 questions, your final difficulty level maps to an estimated vocabulary size.
English Vocabulary Test