You want a real number, not a slogan. Here it is: reaching solid working fluency takes roughly 600 to 750 hours for languages close to English, and up to 2,200 hours for the hardest ones. That is data from the US Foreign Service Institute (FSI), not a marketing promise. At one hour a day, that means about two years for Spanish and around six for Japanese.
In this guide, you will find the full FSI category table, hours per CEFR level, calendar timelines for three daily paces, and the tools that shorten each phase.
Where the numbers come from: 70 years of FSI data
The Foreign Service Institute trains US diplomats in more than 65 languages. After roughly 70 years of intensive courses, it has tracked how long English speakers need to reach “Professional Working Proficiency.” That level sits around B2 to C1 on the CEFR scale. In practice, it means you can work, negotiate, and read the news in the language.
FSI sorts languages into four categories based on how far they sit from English. The further the language, the more hours you need. Importantly, these are classroom hours in a near-ideal setting: small groups, trained teachers, and full-time study. Self-learners should treat them as a floor, not a ceiling.
The FSI category table
Here is the current FSI breakdown, with the class hours needed to reach professional working proficiency.
| FSI category | Example languages | Class hours | Full-time duration |
|---|---|---|---|
| Category I | Spanish, French, Italian, Dutch, Swedish, Norwegian | 600-750 | 24-30 weeks |
| Category II | German, Indonesian, Swahili, Malay | ~900 | ~36 weeks |
| Category III | Russian, Hindi, Turkish, Thai, Vietnamese, Finnish, Greek, Polish | ~1,100 | ~44 weeks |
| Category IV | Mandarin, Cantonese, Japanese, Korean, Arabic | ~2,200 | ~88 weeks |
Two things stand out. First, the gap is enormous: Arabic takes about three times as long as Spanish. Second, even “easy” languages need 600+ hours. Consequently, anyone promising fluency in three months is selling something. For a closer look at both ends of the table, see our guides to the easiest languages to learn and the hardest languages to learn.
How many hours per CEFR level?
FSI measures one finish line. The CEFR scale, on the other hand, breaks the journey into six levels, from A1 (beginner) to C2 (mastery). Cambridge English publishes widely used guided learning hour estimates for each level. The figures below apply best to Category I languages; multiply by two to three for Category IV.
| CEFR level | What you can do | Cumulative hours (approx.) |
|---|---|---|
| A1 | Introduce yourself, handle basic phrases | 90-100 |
| A2 | Simple exchanges on familiar topics | 180-200 |
| B1 | Travel independently, tell stories, handle daily life | 350-400 |
| B2 | Work in the language, argue a point, follow films | 500-600 |
| C1 | Study or work at a professional level with nuance | 700-800 |
| C2 | Near-native precision in almost any context | 1,000-1,200 |
Notice how useful the middle of the table is. B1 arrives at roughly 400 hours, and most travelers and casual speakers are happy there. In other words, “learning a language” does not have to mean C2. If these levels are new to you, our CEFR levels explained guide covers what each one feels like in practice.
What the hours mean for your calendar
Almost nobody studies full-time like FSI diplomats. Therefore, the honest question is: how do these hours translate at a normal pace? The table below converts total hours into calendar time for a Category I language (about 700 hours) and a Category IV language (about 2,200 hours).
| Daily pace | Hours per year | Category I (Spanish, French) | Category IV (Japanese, Mandarin) |
|---|---|---|---|
| 30 minutes/day | ~180 | ~4 years | ~12 years |
| 1 hour/day | ~365 | ~2 years | ~6 years |
| 2 hours/day | ~730 | ~1 year | ~3 years |
Two lessons follow. First, consistency compounds: doubling your daily time cuts the calendar in half. Second, at 30 minutes a day, a Category IV language becomes a decade-long project. For Japanese or Arabic, either raise the daily dose or lower the target level.
One correction applies to self-learners. FSI students also did hours of homework on top of class time, in an intensive setting. Studying alone with mixed-quality methods, expect to need somewhat more total time than the table suggests, especially for speaking.
What speeds you up (and what slows you down)
The FSI numbers are averages. Your own timeline moves with five factors.
- Language distance: the category table above. This is the biggest single factor.
- Prior languages: your second foreign language comes faster. You already know how to learn one.
- Intensity: 10 hours a week beats 3 hours a week by more than 3x, because you forget less between sessions.
- Method: hours spent on comprehensible input and speaking practice count more than hours spent passively watching lessons.
- Immersion: living in the language, even virtually through media and conversation partners, compresses everything.
Age matters less than most people think. Adults learn grammar and vocabulary faster than children; they mainly lose out on accent. Motivation and schedule design, however, decide who actually reaches the finish line.
Tools that compress the timeline
You cannot skip the hours. Nevertheless, you can make each hour count double by matching tools to each phase.
For speaking hours, one-on-one tutoring is the highest-value spend. Preply offers tutors from around $5 per hour as of July 2026, and iTalki community tutors start around $8 per hour. One weekly lesson anchors your routine; the rest of the week feeds it.
For vocabulary, spaced repetition removes wasted review time. Anki is free on desktop and Android ($24.99 one-off on iOS) and remains the most efficient way to keep thousands of words active. Meanwhile, for input hours, LingQ (from $12.99/month as of July 2026) turns articles, podcasts, and books into lessons with instant word lookups.
Finally, AI conversation partners fill the gaps between human sessions with cheap, judgement-free practice. We compare the strongest options in our guide to the best AI tools for language learning.
So, how long does it take to learn a language?
Plan on 600 to 750 hours for a language close to English and around 2,200 hours for the hardest ones, based on FSI data. At one hour a day, that means roughly two years to reach B2 in Spanish or French, and about six for Japanese or Mandarin. Aim for B1 instead, and you can get there in a Category I language within a year of daily practice. Multiple factors can influence the learning process, ass explained in this article on how long it takes to learn Turkish.
Our recommendation: pick a target level (B1 or B2), divide the hours by your realistic daily time, and put the finish date in your calendar. Then protect the routine, because around the intermediate stage progress will feel slower than it is. When that happens, our guide on how to overcome a language learning plateau shows you how to keep the hours compounding.