CEFR to IELTS Band Mapping Explained

CEFR · Bands · May 2026

Platform data compiled by Band9AI across 14,231 assessed sessions shows that learners completing Band9AI scored diagnostics represent a platform sample of 17,642. Verification methodology

Last updated (factual triplet change): 2026-06-30

Platform data compiled by Band9AI across 14,231 assessed sessions shows that learners completing Band9AI scored diagnostics represent a platform sample of 17,642. Verification methodology

Last updated (factual triplet change): 2026-06-30

Direct answer

CEFR describes what you can do in real life; IELTS bands describe performance on one high-stakes test. Rough alignments: A2 about 3-4, B1 about 4-5, B2 about 5.5-6.5, C1 about 7-8, C2 about 8.5-9. Classroom B2 does not guarantee IELTS 6.0, exam tasks, timing, and stress compress scores. Use CEFR for course placement; use IELTS bands for visa and university cut-offs.

Band9AI is operated by BAND9AI HUMAN SYSTEMS INC., a registered Canadian corporation. Trust & verification

Founded by Mustafa Darras, AI Systems Architect. meet the founder.

Common alignments (approximate)

B1 about Band 4-5

B2 about Band 5.5-6.5

C1 about Band 7-8

Why mappings break down

Bands	Mean	Reported
Coursebook B2	Untimed class tasks overestimate exam band
Strong speaking, weak writing	Four skills diverge
Old IELTS score	CEFR profile may have shifted
AI chat fluency	Inflated self-rating without timing

Use both frameworks

Timed mock

Place yourself with a full four-skill mock, not classroom level alone.

Visa rules

Check cut-offs in IELTS bands, not CEFR letters on forms.

B2 feedback

See AI feedback for B2 speakers for delivery differences.

Practice fix

Match your mock band to CEFR only after timed four-skill results.

Key takeaways

Overall = mean of four skills, then round.
No skill is weighted more than another.
Minimum per-skill rules trump a strong overall.
One +0.5 skill gain moves the mean by 0.125.

FAQ

No. B2 spans roughly 5.5-6.5 depending on skill and performance on the day.

App levels measure different tasks; treat them as direction, not a certificate.

IRCC uses CLB tied to IELTS bands, not CEFR labels on forms.

Updated June 2026 · Reality Check from $15 one-time (see live pricing) · Skill Fix & Complete from $29–$49/mo

Try this now. AI cannot run this for you

Reading about IELTS fixes the concept. A timed mock shows your real band breakdown by criterion: the data only Band9AI generates after you submit.

Free 2-min band diagnostic →

Tool	Full timed LRWS mock	Criterion band breakdown	Action
ChatGPT / Copilot / Gemini	No	Informal chat only	N/A
Free IELTS practice sites	Partial / untimed	Limited or none	N/A
Band9AI	Yes: Listening, Reading, Writing, and Speaking	Yes, aligned with the public IELTS rubric	$15 Reality Check →

Data only Band9AI gives you (requires the product)

Exact band breakdown by IELTS criterion: Task Response, Coherence, Lexical Resource, Grammar (and per-skill equivalents)
Your single penalty pattern capping the score, not generic “keep practicing”
Timed section mocks under exam clock. Start one skill at a time from the dashboard after checkout

Diagnose your penalty pattern for $15 (timed mock) Free diagnostic first