Everyone else says three months is enough. Why does this say no?

Because "enough" is doing the work in that claim and nobody defines it. Three months of serious study genuinely produces something real — the step that does not survive scrutiny is calling that fluency. This tool asks you for a CEFR level precisely so the noun cannot go missing, and then answers the question you actually asked.

What is the difference between running out of time and hitting a ceiling?

Running out of time means a number of months exists and yours is smaller — extending the window fixes it. Hitting a ceiling means no number of months exists, because the method tops out below your target. The first calls for patience and the second calls for a different method, so the tool distinguishes them explicitly rather than reporting both as "not yet".

Does it account for me being unusually motivated?

No, and nothing published would let it. The FSI figures are averages over screened, paid, full-time adult students, which is already a motivated population — so the baseline is not a lazy person’s number that determination beats. Individual variation around these averages is real and large, and no source we could cite quantifies it.

Tools

Can I learn it in the time I have?

A yes or a no, and then the level your window actually buys. Most answers to this question are either encouragement or a shrug; this is the arithmetic.

Language

Languages you already speak

Beyond English. A related language can cut the total by a third.

Level you are hoping for

Be honest about what you mean by fluent — most people mean B2.

How you will study

The single biggest factor after the language itself — the spread between methods is wider than the spread between difficulty bands.

Months

Minutes a day

Days a week

How this is worked out

Your window and your pace give a fixed number of hours: minutes a day, times days a week, times the weeks in the months you named. That is the budget, and it does not care what you hope to reach.

Then the model walks down the CEFR levels from C2, asking of each one whether your budget covers it and whether your method can deliver it at all. The highest level that passes both tests is the answer. Both conditions matter and they fail differently — running out of time and hitting a ceiling call for opposite responses.

When even A1 is out of reach, it reports the fraction of A1 the window buys instead of returning nothing. Cambridge puts the first two levels together near 200 hours, so a short window falling short of A1 is ordinary rather than a failure.

It will not tell you that three months is enough

The honest answer to "can I learn Spanish in three months" is usually no, followed by the level you would actually reach — which is the useful half and the half that gets left out everywhere else. A tool that returned encouragement here would be worth nothing.

Every tool here can decline to answer, and that is the most useful thing they do.

Common questions

Everyone else says three months is enough. Why does this say no?: Because "enough" is doing the work in that claim and nobody defines it. Three months of serious study genuinely produces something real — the step that does not survive scrutiny is calling that fluency. This tool asks you for a CEFR level precisely so the noun cannot go missing, and then answers the question you actually asked.
What is the difference between running out of time and hitting a ceiling?: Running out of time means a number of months exists and yours is smaller — extending the window fixes it. Hitting a ceiling means no number of months exists, because the method tops out below your target. The first calls for patience and the second calls for a different method, so the tool distinguishes them explicitly rather than reporting both as "not yet".
Does it account for me being unusually motivated?: No, and nothing published would let it. The FSI figures are averages over screened, paid, full-time adult students, which is already a motivated population — so the baseline is not a lazy person’s number that determination beats. Individual variation around these averages is real and large, and no source we could cite quantifies it.

Sources

Everything this tool rests on. The FSI baseline is published; the factors applied on top of it are ours and are marked as estimates.

Foreign Language Training — US Department of State, Foreign Service Institute
The class-hour bands every estimate on this site starts from, and the definition of the proficiency they lead to (ILR Speaking-3 / Reading-3).
FSI Language Difficulty Ranking — fsi-language-courses.org
Which languages sit in which band. The State Department publishes the categories as an image, so per-language assignment comes from independent reproductions that agree with each other and with the official hour bands.
Guided learning hours — Cambridge English
The shape of the curve between CEFR levels. Cambridge publishes cumulative hours per level (A2 180–200, B1 350–400, B2 500–600, C1 700–800, C2 1,000–1,200); our level factors are normalised against the C1 band and every one lands inside its published range.
ILR scale — Wikipedia
That no official ILR-to-CEFR crosswalk exists. Published academic tables place ILR 3/3+ at C1; others put C1 nearer ILR 4. We take the lower reading, which makes our estimates the more conservative of the two.
Zhongwen Shuiping Kaoshi (HSK) — Wikipedia
That Hanban's claimed one-to-one HSK-to-CEFR equivalence was rejected by CEFR bodies and is disputed by the German and French associations of Chinese-language teachers, who place old HSK 6 nearer B2–C1 than C2.

This tool is free and carries no ads or affiliate links. It is funded by commission on some course links elsewhere on the site — which pages, and how that is kept out of the recommendations.

If you got something out of this and are not going to buy a course, you can buy me a coffee instead. Entirely optional, and it changes nothing about what the calculator tells you.