What Is the CEFR?
The Common European Framework of Reference for Languages (CEFR) is the international standard for describing language ability. It divides learner competence into six levels: A1, A2, B1, B2, C1, and C2. Originally developed by the Council of Europe, the CEFR is now used worldwide by language schools, universities, and employers to assess and communicate language proficiency.
Vocabulary size is one of the strongest predictors of CEFR level. Knowing how many words you need — and which words — is the most efficient path to progressing through the bands.
CEFR Vocabulary Requirements by Level
| Level | Name | Receptive vocabulary | What you can do |
|---|---|---|---|
| A1 | Beginner | ~500–1,000 words | Introduce yourself, ask basic questions, understand simple phrases |
| A2 | Elementary | ~1,000–2,000 words | Handle routine transactions, describe your background, communicate in simple tasks |
| B1 | Intermediate | ~2,000–3,500 words | Deal with most travel situations, produce simple connected text, express opinions |
| B2 | Upper-Intermediate | ~3,500–6,000 words | Understand complex texts, interact fluently with native speakers, produce detailed writing |
| C1 | Advanced | ~6,000–9,000 words | Use language flexibly for academic, professional, and social purposes |
| C2 | Proficient | ~9,000–12,000 words | Understand virtually everything read or heard; express with precision and nuance |
Note: figures reflect receptive vocabulary (words you can recognise and understand). Productive vocabulary — words you actively use — is typically 30–50% smaller.
Why B2 Is the Fluency Threshold
Most linguists and language teachers consider B2 the practical fluency threshold. At this level you have enough vocabulary to understand the vast majority of everyday speech and text without constant dictionary lookups. Research by Nation (2001) suggests that knowing the most frequent 6,000–7,000 word families gives learners coverage of roughly 98% of spoken English — the level needed for comfortable comprehension.
The jump from B1 to B2 is often described as the hardest step in language learning. It requires moving beyond high-frequency core vocabulary into the semi-academic and idiomatic language that fills real conversations and authentic texts.
A1 — Beginner (500–1,000 words)
At A1 you know the most essential everyday words: numbers, colours, family members, days of the week, basic verbs (be, have, go, eat, want), and simple adjectives. You can manage very short, formulaic interactions but rely heavily on repetition and slow speech from your conversation partner.
A2 — Elementary (1,000–2,000 words)
A2 learners can handle routine transactions — shopping, giving directions, describing their job and daily routine. Vocabulary expands to cover common verbs, basic prepositions, and everyday noun phrases. You can read simple texts on familiar topics, though unknown words still cause frequent pauses.
B1 — Intermediate (2,000–3,500 words)
B1 is often described as "survival level." You can handle most situations that arise when travelling, express your opinion on familiar topics, and understand the main point of a TV programme or article when the subject is familiar. Grammar becomes more reliable, and vocabulary starts to include less frequent words and collocations.
B2 — Upper-Intermediate (3,500–6,000 words)
B2 is the level at which English stops feeling like a constant struggle. You can hold a sustained conversation with a native speaker without either party having to adjust significantly. Academic texts, news articles, and professional documents become accessible. This is the minimum level required by most English-medium universities and many international employers.
C1 — Advanced (6,000–9,000 words)
C1 speakers use language spontaneously and fluently. They can understand long, demanding texts, recognise implicit meaning, and produce clear, well-structured text on complex subjects. Vocabulary at this level includes low-frequency academic words, formal register, and a wide range of idiomatic expressions.
C2 — Proficient (9,000–12,000 words)
C2 represents near-native mastery. A C2 speaker can understand virtually everything they read or hear, summarise information from different spoken and written sources, and express themselves with precision and nuance. At this level, vocabulary differences between a C2 learner and an educated native speaker become subtle — mainly in the depth of passive vocabulary and the ease of retrieving rare words.
How to Measure Your CEFR Vocabulary Level
The most accurate way to determine your CEFR level is through a vocabulary size test calibrated to CEFR bands. Our free adaptive test uses a two-phase methodology — a recognition phase to detect overclaiming, followed by adaptive definition questions — to place you accurately on the A1–C2 scale in about 8 minutes.
Find Your CEFR Vocabulary Level
Free adaptive test · 8 minutes · No sign-up required
Take the free vocabulary test →Frequently Asked Questions
How many words does a B2 speaker know?
A B2 speaker typically has a receptive vocabulary of 3,500–6,000 word families. This is enough to understand approximately 95–98% of spoken and written English in everyday contexts.
What CEFR level is needed for university?
Most English-medium universities require B2 as a minimum, with many top institutions requiring C1. The IELTS 6.5 and TOEFL iBT 90 benchmarks correspond roughly to B2/C1 border.
How long does it take to go from B1 to B2?
The Council of Europe estimates approximately 200 guided learning hours to move from B1 to B2. With intensive study and immersion, dedicated learners can achieve this in 6–12 months.
Is C2 the same as native speaker level?
C2 is near-native but not identical. Most educated native English speakers have a vocabulary of 20,000–35,000 word families — far larger than the 9,000–12,000 typical of C2 learners. The CEFR scale was designed for learners, not native speakers.