The US Foreign Service Institute, which has trained American diplomats for decades, places French in Category I, its easiest group for English speakers, at roughly 750 class hours to reach professional working proficiency. That number is the most reliable public benchmark we have, and it is also routinely misread. It describes full-time, small-group instruction with a trained teacher, not evenings on an app.
What do those 750 hours actually correspond to?
Around 750 supervised hours takes a motivated adult to solid B2, occasionally C1, which is the level where you can work in French rather than survive in it. The FSI figure assumes intensive study, about 25 hours of class a week plus homework, which compresses the calendar but does not change the total.
Spread that across a part-time life and the arithmetic is unforgiving:
- Two one-hour lessons a week, 48 weeks a year, is about 96 hours a year
- Add 20 minutes a day of your own practice and you add roughly 120 hours
- That is a little over 200 hours a year, so B2 lands somewhere in year two or three
The learners who beat that timeline are not more gifted. They have simply raised the hours per week, usually by making French part of their day rather than an appointment in their calendar.
How long does each CEFR level take?
Each level takes longer than the one before it, which is why so many learners stall at B1. The Council of Europe defines the levels but deliberately avoids fixed hour counts, since they vary by learner and teaching quality. The ranges below reflect what I see across adult students, not an official standard.
| Level | What you can do | Guided hours, cumulative |
|---|---|---|
| A1 | Introduce yourself, order, ask simple questions | 80 to 100 |
| A2 | Handle daily life, past and future in simple form | 180 to 200 |
| B1 | Hold a conversation, explain an opinion, work in French with effort | 350 to 400 |
| B2 | Argue a point, follow a meeting, work comfortably | 550 to 650 |
| C1 | Nuance, register, humour, long professional documents | 750 to 900 |
The jump from B1 to B2 is the one that surprises people. A1 to A2 feels fast because everything is new and every lesson adds something visible. B1 to B2 is slower because progress moves into precision: the right tense, the right register, the word that is nearly right replaced by the word that is exactly right.
Why do some adults progress twice as fast?
The single best predictor is not talent or age, it is how much French happens between lessons. Two learners with identical lesson counts can finish a year at completely different levels, and the difference is almost always contact time.
What consistently moves people faster:
- Parler dès la première leçon. Speak from the first lesson, badly, out loud, rather than waiting until you feel ready
- Écouter du français tous les jours, même dix minutes. Listen daily, even ten minutes, because listening is the skill that lags furthest behind
- Travailler sur des sujets qui vous concernent. Work on subjects that concern you, your job, your family, your next trip, so the vocabulary has somewhere to stick
- Accepter les erreurs comme des données. Treat mistakes as data, not as failure, since a corrected mistake is worth ten pages of silent reading
What does not work is collecting resources. Three apps, two textbooks and a podcast you never finish will lose to one structured plan followed twice a week.
Conclusion
Put a number on it: if you want B2 for work and you are starting from scratch, plan on two to three years of consistent part-time study, and roughly six to twelve months if you are already at B1. What compresses that timeline is not a method or an app, it is regular speaking practice with someone who corrects you properly and keeps the plan honest. That is what I do with adult learners at frenchwithyann.com, and the first lesson is free, so you can find out where you actually sit on the table above before committing to anything.
Common questions
Can I learn French in three months?
You can reach a usable A2 in three months with daily study, which covers travel, small talk and simple transactions. You will not reach B2, and anyone promising fluency in three months is selling you something.
How many hours a week should I study French?
Two lessons a week plus twenty to thirty minutes of contact with French on other days beats one long session. The gap between lessons is where most forgetting happens, so shrink the gap.
Is French hard for English speakers?
It is among the easiest, because roughly a third of English vocabulary comes from French. Pronunciation and listening are the real obstacles, not grammar or vocabulary.