How long does it really take to learn a language?

It depends on the language and your hours. The US Foreign Service Institute estimates about 690 hours for an easy language like Spanish and around 2,200 hours for a hard one like Japanese, to reach professional working proficiency. At five hours a week, 690 hours is roughly two and a half years; at fifteen hours a week, under a year.

Are the FSI hour estimates reliable?

They are the most widely cited benchmark, drawn from decades of intensive diplomat training. They assume motivated adult learners in full-time classes, so casual learners may take longer, but the relative difficulty between languages holds up well.

Can watching TV count toward these hours?

Yes, when it is comprehensible. Hours of understandable input build listening and vocabulary, which is most of the work. Graded subtitles keep a show understandable so your watch time becomes real practice.

How Long Does It Take to Learn a Language? Free Calculator

Updated August 12, 2026

This calculator estimates how long it takes to learn a language based on the US Foreign Service Institute's study-hour benchmarks and the weekly hours you can put in. Pick a language and your pace to see a realistic timeline to A2, B1, and B2. FSI hours are intensive classroom hours, so treat the result as a benchmark rather than a promise.

LanguageHours per week: 5

Spanish is FSI Category I (about 690 hours to professional working proficiency). At 5 hours a week:

Milestone	Hours	Time at this pace
A2Basic conversation	207	10 months
B1Independent, everyday fluency	380	17 months
B2 to C1Professional working proficiency	690	2 years 8 months

Based on US Foreign Service Institute study-hour benchmarks. FSI hours are intensive classroom hours for motivated adult learners, so they are a benchmark, not a promise. FSI publishes a total to General Professional Proficiency and no figure for any earlier level, so the A2 and B1 waypoints here are our own rounded shares of that total. They are shown so this page can answer when conversation becomes possible without inventing an FSI figure that does not exist.

FSI measures its endpoint as Speaking 3 and Reading 3 on the Interagency Language Roundtable scale, which published crosswalks place somewhere around CEFR B2 to C1. Those crosswalks disagree with each other and no official conversion exists, so treat the CEFR labels here as an approximate guide rather than an equivalence.

Full breakdown: how long does it take to learn Spanish?

Embed or cite the open show difficulty dataset

Building a resource page or teaching a class? This tool is free to link to, and the dataset behind LingoBinge's show recommendations is free to download, cite, or embed.

Canonical source: https://lingobinge.com/research/netflix-show-difficulty-index. Updated August 9, 2026. Reuse the LingoBinge-owned annotations under CC BY 4.0.

Plain-text citation

LingoBinge Netflix show difficulty dataset. LingoBinge. Updated August 9, 2026. https://lingobinge.com/research/netflix-show-difficulty-index. CC BY 4.0.

HTML attribution

<cite>LingoBinge Netflix show difficulty dataset</cite>. LingoBinge. Updated August 9, 2026. <a href="https://lingobinge.com/research/netflix-show-difficulty-index">https://lingobinge.com/research/netflix-show-difficulty-index</a>. <a href="https://creativecommons.org/licenses/by/4.0/" rel="license">CC BY 4.0</a>.

Use with these limitations

This is a curated catalogue of learner-suitable title-language entries, not a random or representative sample of Netflix.
CEFR bands are editorial estimates for listening difficulty, not test results or guarantees that every learner will understand the same material.
Availability changes by country and over time; verify the title in your own Netflix catalogue before choosing it.
Rows with legacy-curated status predate the explicit review-state field and are not represented as evidence of a named human review.

Download the data

It is an exploratory, curated sample rather than a survey of Netflix. Free to download without a sign-up, and free to republish with credit.

Download CSV Download JSON Difficulty methodology Corrections log

Embed the finder

Paste this into your own page. It loads the live interactive finder, so it stays current on its own. Keep the credit line under it: that is the attribution the licence asks for.

<iframe src="https://lingobinge.com/tools/show-finder/embed" width="100%" height="720" loading="lazy" title="LingoBinge Netflix show difficulty finder"></iframe>
<p>Netflix show difficulty data by <a href="https://lingobinge.com/research/netflix-show-difficulty-index">LingoBinge</a></p>

Now put it to work. LingoBinge swaps Netflix subtitle words at your level, starting with the highest-frequency ones, and saves them for spaced review.

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Frequently asked questions

How long does it really take to learn a language?: It depends on the language and your hours. The US Foreign Service Institute estimates about 690 hours for an easy language like Spanish and around 2,200 hours for a hard one like Japanese, to reach professional working proficiency. At five hours a week, 690 hours is roughly two and a half years; at fifteen hours a week, under a year.
Are the FSI hour estimates reliable?: They are the most widely cited benchmark, drawn from decades of intensive diplomat training. They assume motivated adult learners in full-time classes, so casual learners may take longer, but the relative difficulty between languages holds up well.
Can watching TV count toward these hours?: Yes, when it is comprehensible. Hours of understandable input build listening and vocabulary, which is most of the work. Graded subtitles keep a show understandable so your watch time becomes real practice.