Learn Korean Numbers
koreannumbers.school is a free interactive tool for mastering the Korean number systems. Whether you're a beginner learning your first Korean words or an intermediate student looking to build fluency, our flashcard drills help you internalize numbers through active recall and spaced repetition.
Two Number Systems
Korean uses two distinct counting systems that learners must master:
- Sino-Korean (한자어 수사) — 일, 이, 삼, 사, 오... Used for dates, money, phone numbers, minutes, and formal counting.
- Native Korean (고유어 수사) — 하나, 둘, 셋, 넷, 다섯... Used for hours, age, counting objects, and with most counters.
Practice Modes
Train with contextual exercises designed around real-world usage:
- Basic 1-10 — Build a foundation with core numbers using spaced repetition
- Compound Numbers — Progress from tens to thousands to millions
- Dates — Practice months (월) and days (일) in Sino-Korean
- Money — Learn to read Korean Won (원) amounts
- Time — Master the mixed system: Native hours + Sino minutes
- Age — Practice ages with Native Korean + 살
- Counting — Objects with counters like 개, 명, 마리, 권
Features
- Timed drill sessions (5-20 minutes)
- Spaced repetition algorithm for optimal retention
- Score tracking with streaks and accuracy
- Progress saved locally in your browser
- Works offline — no account required
- Mobile-friendly responsive design
Why Numbers Matter
Numbers appear constantly in everyday Korean: telling time, shopping, giving your age, reading addresses, and understanding prices. Fluent number recognition is essential for real conversations and removes a common stumbling block for Korean learners.