IELTS to CEFR: what band is B2, C1, and what they mean

A university page says "B2 or above." Your IELTS report says 6.0. Are you in? The answer is yes, and you can check it against what IELTS itself publishes: band 5.5 to 6.5 is B2, and band 7 to 8 is C1. Two numbers settle most of these questions.

The trouble is that a search for "IELTS CEFR" returns tables that disagree with each other, especially at the lower levels. This guide sticks to what IELTS has actually stated, explains what B2 and C1 mean in practice, and is honest about the part of the scale where no official band range exists.

The mapping IELTS actually publishes

IELTS states the alignment for the upper half of the scale directly:

CEFR level	IELTS band
C2 (Proficient)	8.5 to 9.0
C1 (Advanced)	7.0 to 8.0
B2 (Upper intermediate)	5.5 to 6.5
B1 (Intermediate)	4.0 to 5.0
A2 (Elementary)	not published
A1 (Beginner)	not published

Those rows come from IELTS's own CEFR alignment. Read the table by level rather than by band and the common questions answer themselves. Band 6.0 is B2. Band 7.0 is C1. Band 8.5 and above is C2.

One caveat IELTS makes itself: the CEFR was never designed as the basis for precise equating, so each test provider researches and evidences its own alignment. The mapping is research-based, not a conversion formula, which is why the boundaries are softer than a table makes them look.

The borderline bands most tables hide

IELTS is candid about something the tidy tables leave out: its band scores "have never aligned exactly with the CEFR transition points." Three bands sit on a line rather than inside a level.

Band 5 is the first. IELTS says it is not clear whether band 5 is B1 or B2, so a 5.0 can be argued either way. Band 6.5 is the second, because the C1 threshold falls between 6.5 and 7, which means many 6.5 candidates are already working at C1 even though the published range puts 6.5 in B2. Band 8 is the third: IELTS calls it borderline, with 8.5 and higher recognised as C2.

That matters when a requirement is written as a level. If a course asks for C1 and you hold a 6.5, you are on the boundary rather than clearly inside it, and the admissions office will read the number, not the argument.

Below band 4.0 there is nothing official

Here is where most CEFR pages quietly invent figures. You will see A2 listed as IELTS 3.0 to 3.5 on several preparation sites. That is not an IELTS figure. The official alignment runs from band 4.0 upward and stops there; A2 and A1 have no published band range at all.

There is a practical reason. IELTS is built to discriminate between candidates at the levels universities and immigration authorities actually ask for, which start at B1 and cluster at B2 and C1. Bands below 4.0 say little more than "not yet at the level the test is designed to measure." So if you are hunting for the official IELTS band for A2, there isn't one, and a site handing you a precise range is filling a gap the test itself left open.

What B2 actually means

B2 is the "independent user" level, and it is the one most undergraduate courses ask for. At B2 you can follow the main ideas of complex text on both concrete and abstract topics, hold a conversation with native speakers with enough fluency and spontaneity that neither side is straining, and write clear, detailed text across a range of subjects.

In IELTS terms that spans 5.5 to 6.5, which is a wide band of ability. A 5.5 and a 6.5 are both B2, yet they are a full band apart on the test, and the 6.5 candidate handles denser reading and produces noticeably more accurate writing. This is why a university asking for "B2" usually also states a specific IELTS number: the CEFR level is too coarse on its own to be an admissions rule.

What C1 actually means

C1 is the "proficient user" level, the one postgraduate courses and professional registration tend to want. At C1 you can understand long, demanding texts and pick up implicit meaning, express yourself fluently without obviously searching for words, and use English flexibly for academic and professional purposes.

That is IELTS 7.0 to 8.0. The jump from B2 to C1 is the one most candidates are actually chasing, since it is where the entry requirement for a master's degree usually sits, and it is the 0.5 gap from 6.5 to 7.0 that defines the boundary. Note what that half band buys you: it crosses the line from independent user to proficient user, which is why so many requirements are written at exactly 7.0.

What your university is really asking for

Requirements are written both ways, sometimes in the same paragraph. "B2 or equivalent" and "IELTS 6.5" are the same requirement expressed twice, and when the two disagree, the IELTS number wins because it is the one on your certificate.

Two things to watch. First, a stated CEFR level is a range, so "B2" satisfied by a 5.5 may still fail an "IELTS 6.0 minimum" written elsewhere on the page. Second, many courses set a minimum in each section on top of the overall band, and the CEFR level says nothing about that. Read the section minimums, not just the level.

For the full picture against TOEFL, TOEIC and Eiken, all connected through their own official CEFR alignments, the score conversion table has the cross-test view, EIKEN to IELTS follows the EIKEN grades through the CEFR in detail, and how IELTS band scores are calculated covers the rounding that decides which side of a boundary you land on.

Moving up a CEFR level

Here is the thing about CEFR levels: you cannot practise "B2 to C1" directly, because a level is a description of what you can do, not a task list. What you can work on is the IELTS band underneath it, and that decomposes into something concrete.

Writing and Speaking are marked on four criteria each, so a 6.5 that needs to become a 7.0 is almost never weak everywhere. It is usually band 7 on three of the Band Descriptors and band 6 on one. That single criterion is the difference between B2 and C1 on your certificate, and it has a name: Task Response, Coherence, Lexical Resource, or Grammatical Range.

That is what IELTS Drills is built to show you. Feedback comes back tagged to one Band Descriptor rather than a vague overall band, so the level jump turns into one axis you can drill for five minutes a day.

Frequently asked questions

What CEFR level is IELTS 6.5? B2, at the very top of the range. IELTS puts B2 at bands 5.5 to 6.5 but also says the C1 threshold falls between 6.5 and 7, so a 6.5 sits on the boundary rather than safely inside B2.

What IELTS score is C1? Band 7.0 to 8.0. That is why postgraduate courses asking for C1 usually state an IELTS minimum of 7.0.

Is IELTS 6.0 B1 or B2? B2. The B2 range starts at 5.5, so a 6.0 sits comfortably inside it.

What IELTS band is A2? IELTS does not publish a band range for A2 or A1. Its alignment runs from band 4.0 upward, so tables giving an exact A2 figure such as 3.0 to 3.5 are not using official IELTS numbers. B1, by contrast, is published as 4.0 to 5.0.

Is CEFR the same as an IELTS band? No. CEFR is a shared framework of levels, and IELTS is a test scored 0 to 9 that aligns itself to that framework through research. One CEFR level covers a range of bands, so the two are not interchangeable.

Does a higher band always mean a higher CEFR level? No. Bands 5.5, 6.0 and 6.5 are all B2, so half a band up may leave you on the same level. The levels change at 5.5 (into B2), 7.0 (into C1) and 8.5 (into C2).

The bottom line

IELTS to CEFR comes down to four published ranges: 4.0 to 5.0 is B1, 5.5 to 6.5 is B2, 7.0 to 8.0 is C1, and 8.5 upward is C2. Below band 4.0 IELTS states nothing, so treat any precise A2 figure you find elsewhere as someone's estimate rather than an official equivalence, and remember that bands 5, 6.5 and 8 sit on boundaries. Check the level your course asks for, then check the IELTS number and section minimums it also lists, because that number is what your certificate has to satisfy. The cross-test view is in the score conversion table, and if the level you need sits on the other side of 7.0, the work is one Band Descriptor at a time, five minutes a day.