How long does it take to learn Shanghainese?
Every answer you will find online is a number borrowed from Mandarin. There is no official estimate for Shanghainese, because no institution has ever taught it at a scale that would produce one.
Where the numbers come from
The figures everyone quotes come from one place: the United States Foreign Service Institute, which trains American diplomats and publishes how long its courses take. It sorts languages into four categories:
| Category | Time | Examples |
|---|---|---|
| I | 24–30 weeks, 552–690 class hours | French, Spanish, Italian, Dutch, Portuguese |
| II | about 36 weeks, 828 class hours | German, Indonesian, Swahili, Haitian Creole |
| III | about 44 weeks, 1,012 class hours | Russian, Vietnamese, Hindi, Greek and many more |
| IV — “super-hard” | 88 weeks, 2,200 class hours | Arabic, Japanese, Korean, Chinese – Mandarin, Chinese – Cantonese |
That bottom row is the source of the familiar 2,200-hour figure for Chinese. Note that FSI lists Cantonese and Mandarin as two separate entries, both in the hardest category — so the institute plainly does distinguish Chinese varieties when it teaches them.
Shanghainese is not on the list
It is not in Category IV with Mandarin and Cantonese. It is not in any category. Searching the FSI pages for Wu, Shanghai or Shanghainese returns nothing at all.
Nor is it anywhere else. The Defense Language Institute, the other big producer of these numbers, teaches Chinese Mandarin and no other Chinese variety. No university course, government framework or proficiency scale I could find publishes an hours-to-proficiency figure for any Wu variety.
So the honest headline is this: as far as any institution that measures such things is concerned, Shanghainese does not take any particular number of hours to learn, because nobody has ever measured it. Any specific figure you meet online — 1,500 hours, 2,200 hours, two years — is somebody’s extrapolation from Mandarin, presented with a confidence the underlying data does not have.
What the FSI number means, even for Mandarin
Before borrowing it, it is worth knowing what it measures, because it is routinely misquoted.
- It is for US diplomats. Selected adults, native English speakers, paid to be there full time.
- It is intensive classroom time. FSI describes a typical week as 23 hours in class plus 17 hours of self-study — so the 2,200 “class hours” sit on top of roughly as much study again.
- It targets a specific, high level. An integrated score of 3 on the Interagency Language Roundtable scale — professional working proficiency, the ability to handle most formal and informal conversation on practical, social and professional topics. It is not “conversational”, and it is well above what most learners mean by fluent.
- FSI says it varies. Its own page notes the time depends on natural ability, prior linguistic experience and time in class.
A self-taught adult doing forty minutes a day and hoping to chat is not the population that number describes, in any language.
Why the extrapolation breaks, in both directions
Suppose you borrowed 2,200 hours anyway. It would be wrong twice over, and the errors do not cancel.
Harder than Mandarin: there is almost nothing to learn from
The scarcity is real and it is documented in an adjacent field. A 2026 paper assembling Wu speech datasets describes the situation bluntly: despite its linguistic significance and large speaker population, Wu “has long been hindered by the lack of large-scale speech data, standardized evaluation benchmarks, and publicly available models”. If there is not enough recorded Wu to train a speech model, there is not enough to build a course from either.
For a learner that means no graded readers, essentially no textbooks, no exam to benchmark against, few teachers, and a thin supply of listening material — the whole inventory is on the resources page, and it is short. Hours spent are worth less when you have to find your own material.
Easier than Mandarin: if you already have Mandarin
Most people learning Shanghainese arrive with Mandarin, and they are not starting from zero. The writing system transfers whole, a large part of the vocabulary transfers, the grammar’s basic shape transfers, and the experience of hearing a tone language transfers. What does not is set out on the page for Mandarin speakers — and it is a shorter list than the transfers, but it contains the highest-frequency words in the language.
How many hours does that saving amount to? Nobody knows. I found no study converting prior related-language knowledge into a time reduction for a spoken second language, and I am not going to invent a percentage.
Why a single number is the wrong shape of answer
There is a wider reason to distrust hour-counts, and it is not specific to Shanghainese. The popular idea that a fixed quantity of practice produces expertise has been tested and does not hold up well: a 2014 meta-analysis by Macnamara, Hambrick and Oswald found deliberate practice accounted for about 26 per cent of the variance in performance at games, 21 per cent in music, 18 per cent in sport, and under 4 per cent in education and the professions.
Hours matter. They are just not most of the story, and the more multidimensional the skill, the less of the story they are. Language is about as multidimensional as skills get.
What can honestly be said
Not a number, but not nothing either. Reasoning from what the difficulty page lays out, and flagged as reasoning rather than measurement:
- A few weeks of daily study gets you greetings, numbers, prices and food — enough to be visibly trying, which in Shanghai is worth more than it sounds. The phrases page is roughly that much material.
- A few months, if you have Mandarin, gets you to following simple conversation about familiar subjects and producing short exchanges of your own.
- Longer than the equivalent in Mandarin to go beyond that, for the materials reason rather than anything about the language itself. Shanghainese grammar is not harder than Mandarin’s and the tones are arguably easier.
- A plateau you have to work around. This is the real difference. In Mandarin, the intermediate wall is where the textbooks get you through. In Shanghainese there are no textbooks at that level, so progress depends on finding people to talk to.
Which points at the actual answer to the question. The binding constraint on learning Shanghainese is not hours; it is access — to material, and to speakers. Someone with Shanghainese relatives and forty minutes a day will pass someone with no contact and two hours a day, and no hour-count predicts that.
Sources
- US Department of State, Foreign Service Institute: Foreign Language Training — the four categories, the 88 weeks and 2,200 class hours for Category IV, the ILR level 3 target, and the 23-hours-in-class-plus-17-self-study week
- US Department of State (2021–2025 archive): Foreign Language Training — the same Category IV list, with General Professional Proficiency and ILR Speaking-3/Reading-3
- Defense Language Institute Foreign Language Center: languages taught — Chinese Mandarin, and no other Chinese variety
- WenetSpeech-Wu: Datasets, Benchmarks, and Models for a Unified Chinese Wu Dialect Speech Processing Ecosystem (2026), arXiv:2601.11027 — on the lack of large-scale Wu speech data
- Macnamara, B. N., Hambrick, D. Z. and Oswald, F. L. (2014). Deliberate Practice and Performance in Music, Games, Sports, Education, and Professions: A Meta-Analysis. Psychological Science 25(8)
- LTL Shanghai: Shanghainese — a private school offering the language, with no time estimate