Korean Age Calculator
Convert your age to the traditional 🇰🇷 Korean system in real time. Fully client-side.
🔀 Calculate using
Tip: Both methods give the same Korean age when inputs match.
The Gregorian calendar year (e.g., 2025).
Enter your birth year (not the full date).
🇰🇷 Korean age
This is the traditional “Korean age”.
Quick summary
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🧮 Step-by-step derivation
📚 Reference (for context)
| System | Rule | Formula (given inputs) |
|---|---|---|
| International age | 0 at birth; +1 on your birthday | Age = current year − birth year (adjust by birthday) |
| Korean age (traditional) | 1 at birth; +1 every Jan 1 | By year: (current year − year of birth) + 1 By age: age + 1 (if birthday passed) or age + 2 |
| “Year age” (calendar age) | Everyone born same year has same age | current year − birth year |
South Korea standardized official use of international age on 28 Jun 2023, but “Korean age” is still used informally.
- Law Library of Congress (Jan 27, 2023): unification of age-counting systems.
- Reuters (Jun 28, 2023): international method required in official use.