CEFR Levels Explained: What A1 to C2 Mean for Your English Vocabulary

You have seen the letters on course brochures, exam results and app settings: A2, B1, C1. They look like grades. They are not. They are descriptions of what you can do in a language, and for vocabulary they are the most useful map you have.

This guide explains the six CEFR levels in plain terms, what each one means for the words you know, how to find your own level quickly, and how the levels line up with exams like IELTS and TOEFL.

What the CEFR is

The Common European Framework of Reference for Languages is a scale published by the Council of Europe in 2001. It describes six levels of ability, grouped in three bands:

• A – Basic user (A1, A2)
• B – Independent user (B1, B2)
• C – Proficient user (C1, C2)

Each level has “can-do” descriptors (“can understand the main points of clear standard input on familiar matters…”). The framework is used across Europe and far beyond it, by exam boards, universities, employers and most serious language apps, including Lexer.

For a vocabulary learner, the levels do two jobs. They tell you roughly which words you should know, and they tell you which words to learn next.

The six levels, for vocabulary

The word counts below are commonly cited ranges, not official figures; the CEFR itself does not prescribe vocabulary sizes. Treat them as a sense of scale.

A1 — Beginner

You can introduce yourself, ask simple questions and understand slow, clear speech about everyday things. Vocabulary: a few hundred to about a thousand words, concrete and high-frequency. House, water, work, happy.

A2 — Elementary

You handle routine exchanges: shopping, directions, simple descriptions of your background. Vocabulary around 1,500–2,000 words. Decide, journey, weather, improve.

B1 — Intermediate

The level where English becomes useful. You follow the main points of clear speech, cope with travel, write connected text on familiar topics. Vocabulary roughly 2,500–3,000 words. You start meeting abstract words. Achieve, environment, opinion, reliable.

B2 — Upper-intermediate

You read articles, follow arguments, hold a discussion with native speakers without strain. Vocabulary around 4,000–5,000 words. This is where resilient lives, along with substantial, allocate, controversial, sustainable. B2 is the level most universities and employers ask for, and the level where news becomes readable rather than decodable.

C1 — Advanced

You read demanding texts, catch implicit meaning, write well-structured arguments. Vocabulary 6,000–8,000+ words, including nuance and register: mitigate, ambivalent, scrutiny, undermine.

C2 — Mastery

Near-native command. You understand virtually everything and express fine shades of meaning. Vocabulary beyond 10,000 word families, including the rare and the idiomatic.

Why the words get rarer as you climb

Picture an eye chart: A1 in huge letters at the top, C2 tiny at the bottom. That is how word frequency works. The first thousand words of English cover most of everyday speech; every level after that adds words you meet less and less often. The higher you go, the rarer the words, and, as the app puts it, so are the people who know them.

How to find your level in a minute

The traditional way is a placement test: an hour, a hundred questions, a score. There is a faster way that works well for vocabulary specifically: an adaptive word test.

Lexer’s test takes about a minute. You see a word and say whether you know it. Say yes to environment and the next word is harder; say no to mitigate and the next one is easier. Sometimes the app checks you: “What does distinct mean?” with four options, because knowing a word is more than recognising its shape. After a couple of dozen words the test has found the band where your knowledge thins out, and it reports a level: B2 — Upper-intermediate, with an estimate of the share of learners you are ahead of.

It is honest about what it is: a vocabulary placement, not a full assessment of your speaking or writing. But for deciding which words to learn tomorrow, it is exactly the right tool.

How CEFR maps to IELTS, TOEFL and other exams

Exam boards publish their own alignments; these are the commonly used ranges.

CEFR	IELTS (band)	TOEFL iBT	Cambridge
B1	4.0–5.0	42–71	PET / B1 Preliminary
B2	5.5–6.5	72–94	FCE / B2 First
C1	7.0–8.0	95–113	CAE / C1 Advanced
C2	8.5–9.0	114–120	CPE / C2 Proficiency

TOEIC, SAT and GRE do not map as cleanly, but the pattern holds: the vocabulary that moves scores in all of them is B2 and above, learned in context. If you are preparing for one of these exams, your job is to climb one band in the words you can actually use.

Using your level to learn faster

Knowing your level is only useful if it changes what you study. Three ways to use it:

Learn from your band, not above it. Words two levels up are not ambitious; they are inefficient. You will not meet them often enough to keep them. In Lexer your daily words come from your current band, and when you level up the deck starts drawing from the next one.

Learn in context. At B1 and above, the words are abstract and their meaning depends on their company. Resilient economy and resilient person are the same word doing different work. This is why we built the app around words from real news: the sentence carries the level as much as the word does.

Review on a schedule, not a whim. Climbing from B1 to B2 means roughly 1,500 new words that have to survive. That is a job for spaced repetition, not willpower.

Where levels show up in Lexer

• Every word carries a CEFR chip (A1–C2), so you always know what you are looking at.
• The level test places you in a minute.
• Your deck draws from your band.
• Level seals mark each band you complete, and your progress screen tells you how far the next one is (“60 words to the C1 seal”).
• When you cross a threshold you get a quiet moment, not confetti: Welcome to B2. Your deck now draws from the next band.

If you want to find your level now, the test is part of the first minute in the app. It is free, on iPhone and iPad.