What A1 to C2 actually mean, and what they deliberately do not
CEFR describes what you can do at six levels and publishes no study hours, on purpose. The hour figures attached to it come from one exam board, about its own exams. Knowing which is which fixes most confusion in this field.
Every tool on this site asks you for a CEFR level rather than for "fluency", because fluency is not a level and a calculator that accepted it would be inventing the most important number in the answer.
So it is worth knowing what the six levels are, and — more usefully — what the framework refuses to say.
The six levels, in plain terms
The Council of Europe defines these through can-do statements. Compressed:
| Level | What it looks like |
|---|---|
| A1 | A handful of set phrases. Introduce yourself, order something, understand slow speech aimed at you. |
| A2 | Simple everyday exchanges. Shopping, directions, describing your background in short sentences. |
| B1 | Hold a conversation. Handle most travel situations, describe experiences, explain an opinion simply. |
| B2 | Work and study in the language. Follow a complex discussion, argue a position, interact with native speakers without strain on either side. |
| C1 | Advanced, flexible use. Express yourself fluently and precisely, and use the language effectively for social, academic and professional purposes. |
| C2 | Near-native command. Understand virtually everything, summarise from multiple sources, express fine shades of meaning. |
Two of these matter more than the others.
B2 is what people mean by fluent. Conversation without visible effort, work in the language, films without subtitles, occasional errors that do not matter. If your target is unstated, this is almost certainly it.
B1 is where this planning model starts making method differences larger. The rationale is that upper-level work includes more novel production and correction, while early work contains more bounded forms. The multipliers and app-only ceiling are model assumptions, not CEFR findings.
What CEFR does not say
It publishes no study hours. Not for any level, in any language. This is deliberate and it is the same choice ACTFL makes for the US, and it is defensible: hours depend on the language, the learner and the method, and a framework describing attainment has no business implying a timeline.
So where do the hour figures come from?
From exam boards, about their own exams. Cambridge English publishes guided-learning-hour bands for its qualifications — roughly 180–200 cumulative to A2, 350–400 to B1, 500–600 to B2, 700–800 to C1, 1,000–1,200 to C2. Those are the source of essentially every "hours to CEFR level" figure in circulation, including the shape of the curve in our own model.
They are exam-preparation figures for English, published by a body with standing to publish them. They are not a CEFR pronouncement, and they are not about your language.
Two consequences worth carrying around
Cumulative progress is not the same as equal visible gains. In the Cambridge midpoints, the marginal guided-learning hours stay roughly flat through C1: about 190 to A2, then another 185 to B1, 175 to B2 and 200 to C1. Each similar block becomes a smaller share of the total journey; C2 then rises more sharply.
Our model borrows that cumulative shape — A1 at 13% of the full figure, B1 at 50%, B2 at 73%, C1 at 100% — and normalises it against C1. It is a planning curve, not a level-by-level fit; 27% of the 750-hour C1 midpoint, for example, is 202.5 hours and sits just above Cambridge's 180–200 A2 band. Separately, the site treats NFATC's integrated ILR 3 Speaking-and-Listening benchmark as a C1 planning anchor; no standards body publishes that crosswalk. A previous source check also found that the Cambridge URL cited here had been fabricated and returned 404. The real page was substituted and the non-exact fit is now stated instead of hidden.
An exam level is not a CEFR level. Exams certify a syllabus. Where an exam board asserts its own CEFR alignment without an external study, that assertion is worth what it cost — the HSK case is the clearest example.
Using this
Pick a level before you pick anything else. In our planning curve it changes the estimate by about 3.7× between A2 and C1, and it is the input every honest estimate needs and most published ones quietly assume.
The calculator asks for it directly, and the methodology shows the factor applied at each level and where it came from.
Sources
Every figure above, and where it came from. A post that traces other people's unsourced numbers does not get to have any of its own.
- Guided learning hours — Cambridge English
The cumulative shape between CEFR levels. Cambridge publishes guided-learning-hour bands for its English qualifications (A2 180–200, B1 350–400, B2 500–600, C1 700–800, C2 1,000–1,200). Our factors are normalised against C1 rather than fitted to every band; for example, 0.27 × the 750-hour C1 midpoint is 202.5, just above the A2 band.
- Foreign Language Training — US Department of State, National Foreign Affairs Training Center
The current NFATC training timelines: a typical week is 23 class hours plus 17 hours of self-study, aimed at an integrated ILR 3 in Speaking and Listening. Category I lists 24–30 weeks; using the page's typical class week, this site derives 552–690 class hours. Categories II–IV print 828, 1,012 and 2,200.
- ACTFL Proficiency Guidelines — American Council on the Teaching of Foreign Languages
The proficiency scale ASL is assessed on. Like CEFR and unlike FSI, it describes what a learner can do and deliberately makes no claim about how long getting there takes.