How long does it take to learn Korean?
The US Foreign Service Institute places Korean in Category IV, the hardest group, estimating 2,200 class hours to reach professional working proficiency. That figure describes full-time intensive instruction for native English speakers with a track record of learning languages, so it is a floor for a favourable case rather than a typical outcome — but it is the most soundly based number available, and it is the FSI's, not ours.
Key figures
- FSI estimate
- 2,200 class hours
- Core Korean words in InputDojo
- 181
- Time to read Hangul
- 1-2 days
Category IV, for a native English speaker in intensive instruction.
The one part of Korean that is genuinely quick.
The alphabet is free, the grammar is not
Korean is the outlier in the hardest category because its writing system is not the problem. Hangul is featural, regular and readable within a couple of days, which makes the first week unusually rewarding. The hours instead go to grammar that shares almost nothing with English: verbs at the end, particles marking every role in the sentence, and a system of speech levels that attaches formality to the verb ending so no sentence can be neutral. There is very little structural transfer from English, and that absence is what the 2,200 hours is measuring.
What the FSI number does and does not mean
The estimate comes from diplomatic language training: small classes, full days, motivated adults selected partly for aptitude, and immersion alongside. Almost nobody studying independently matches those conditions, so treat 2,200 class hours as a lower bound under ideal circumstances. The more useful reading is comparative — it tells you reliably that Korean sits where it sits relative to other languages, which is what most people are really asking.
Hours are the wrong unit anyway
Two people can log identical hours and end up in very different places, because an hour of decoding sentences you barely understand and an hour of reading material pitched just above your level do not produce the same learning. What predicts progress is time spent understanding real language rather than time spent studying about it. The practical implication is to reach material you can mostly follow as early as possible, and then increase the volume.
The pages behind these numbers
Frequently asked questions
Is Korean easier than Japanese?
The writing system is far quicker to learn. The FSI rates both in its hardest category, and the grammars are structurally similar to each other and unlike English.
How long to learn Hangul?
One to two days for reading, longer for fluent decoding at speed.
Do I need Hanja?
Not for everyday modern Korean. It appears in academic and legal writing and in disambiguating some vocabulary, but it is not required for general literacy.