Three groups, six levels
CEFR organizes ability into three broad bands, each split into two levels. A covers Basic User (A1, A2). B covers Independent User (B1, B2). C covers Proficient User (C1, C2). The broad band tells you roughly where someone stands; the specific level tells you precisely.
Why six levels specifically
Six levels struck a balance the Council of Europe judged workable: enough granularity to distinguish a true beginner from someone who can already hold a basic conversation, without so many levels that the distinctions become meaningless or impossible to test for reliably. Earlier language proficiency scales varied wildly by country and institution; CEFR's six-level structure became the reference point most later frameworks and exams aligned to.
How official exams map onto the scale
IELTS, TOEFL, Cambridge exams (like B2 First or C1 Advanced, whose names directly reference their target CEFR level), Goethe-Zertifikat, and DELF all publish scoring guides that state which CEFR level a given result represents. This is what makes CEFR useful as a universal reference: an employer doesn't need to know how IELTS scoring works if the candidate can simply state their CEFR level, since every major exam is designed to map back onto this same six-point scale.
Where an online test fits
An adaptive online test like Examinizer's measures you against the same CEFR descriptors that official exams use, without the multi-hour format or advance booking those exams require. It won't replace an accredited exam where one is legally required, but for understanding where you stand on the scale right now, it gives an accurate, immediate answer.
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Common questions
The A, B, and C groupings, Basic User, Independent User, Proficient User, give a quick way to describe someone's general category before drilling into the specific sub-level, which is useful for job postings or course descriptions that don't need the finer distinction.
No. Each level up generally requires more study time than the one before it. Moving from A1 to A2 might take 60 to 100 hours, while B1 to B2 often takes 150 to 250 hours, since higher levels demand broader vocabulary and more nuanced grammar control.
Exam boards publish their own conversion tables, and while they broadly agree, small differences exist because each exam weighs speaking, writing, listening, and reading slightly differently.
Yes. CEFR describes general communicative ability rather than grammar specific to any one language, which is why it has been adapted for use with dozens of languages well beyond the European languages it was originally designed around.