Born in 2018: Korean age in 2026
Someone born in 2018 is 8 in international age after their birthday in 2026 and 7 before it. In the old Korean counting age they would be 9, and their year age is 8. Korean law has long counted age in full years, and amendments effective June 28, 2023 made international age the explicit default in civil and administrative matters, so 8 (or 7 before the birthday) is the age that counts on paper. 2018 was the Year of the Dog (개띠) — though a birthday before Seollal (February 16, 2018) is sometimes counted as the Rooster, the sign of 2017.
Three ways to count the age of someone born in 2018
| Method | How it is counted | Age in 2026 |
|---|---|---|
| International age (만 나이, man-nai) | 0 at birth, +1 on each birthday. The explicit legal default since the June 28, 2023 amendments. | 7 before birthday, 8 after |
| Year age (연 나이, yeon-nai) | 2026 − 2018. Same for everyone born in 2018, birthday ignored. | 8 |
| Old Korean age (세는 나이, se-neun nai) | 2026 − 2018 + 1. 1 at birth, +1 every January 1. | 9 |
Counting from November 12, 2026: a person born in 2018 whose birthday falls between January 1 and November 12 has already turned 8 this year, and one born later in the year is still 7. When fans online say "Korean age", they usually mean the old counting age (9 here), which runs one or two years ahead of international age. For an exact answer on a specific date, enter the full birth date in the international age calculator.
Age of someone born in 2018, 2026–2030
| Year | International age before birthday | International age after birthday | Year age | Old Korean age |
|---|---|---|---|---|
| 2026 | 7 | 8 | 8 | 9 |
| 2027 | 8 | 9 | 9 | 10 |
| 2028 | 9 | 10 | 10 | 11 |
| 2029 | 10 | 11 | 11 | 12 |
| 2030 | 11 | 12 | 12 | 13 |
The old Korean age and year age go up together on January 1, while international age goes up on the birthday itself. That is why, between New Year and the birthday, the old Korean age is two years ahead of international age (9 vs 7 in 2026), and only one year ahead after the birthday.
Korean zodiac for 2018: Dog
In the 60-year sexagenary cycle, 2018 is the Musul year (무술년), the year of the Earth Dog. Koreans call the animal sign 띠 (tti), so a person born in 2018 is "개띠". The date on which the animal changes is not set by law; it is usually taken to be Seollal (설날), the lunar new year, while saju fortune-telling uses Ipchun (입춘) around February 4.
Seollal in 2018 fell on February 16. If you were born between January 1 and the day before that, you are sometimes counted as the Year of the Rooster (2017) instead. The same animal returns every 12 years, so people born in 2006 and 2030 share the Dog sign. The next Year of the Dog is 2030.
Milestones in Korea for people born in 2018
These years add the age set by Korean law to 2018. Early or delayed school entry, repeating a year or personal circumstances can change the real year, and where a system did not exist yet, the note says so.
| Milestone | Year | As of 2026 | Note |
|---|---|---|---|
| Elementary school entry | 2025 | Passed | March of the year after the child turns 6 (international age). |
| Year age 19: may buy alcohol and tobacco | 2037 | In 11 years | Under the current Youth Protection Act (청소년 보호법) rule, a person is a minor while "current year − birth year" is under 19, so everyone born in 2018 reaches this on January 1 regardless of birthday. |
| Military service examination (men) | 2037 | In 11 years | In the year of turning 19 in year age (for some, the year of turning 20). |
| National Pension old-age pension starts (age 65) | 2083 | In 57 years | The starting age depends on birth year (60 to 65). At least 10 years of contributions are required. |
How Korean law counts age, and which rules still use year age, is explained on the Korean age by birth year page.
Frequently asked questions
How old is someone born in 2018 in Korean age?
In 2026, the old Korean counting age (세는 나이) of someone born in 2018 is 9. Their international age, the explicit legal default in Korea since the June 28, 2023 amendments, is 7 before their birthday and 8 after it, and their year age is 8.
What is the Korean zodiac animal for 2018?
2018 is the Year of the Dog (개띠), the Musul year (무술년) in the sexagenary cycle. Seollal in 2018 was on February 16, so if you were born before that date you are sometimes counted as the Rooster instead.
Is Korean age still used in Korea?
Not officially. Korean law has long counted age in full years, and amendments effective June 28, 2023 made international age the explicit default in civil and administrative matters unless a law says otherwise. Some laws still use year age (current year − birth year), such as the Youth Protection Act for alcohol and tobacco and the Military Service Act, and the old counting age survives only in casual conversation.
When can someone born in 2018 buy alcohol in Korea?
Under the current Youth Protection Act rule, a person is a minor while "current year − birth year" is under 19. Everyone born in 2018 reaches year age 19 on January 1, 2037, regardless of birthday.
← Born in 2017 · All birth years · Born in 2019 →
Sources
- Korea Law Information Center (국가법령정보센터): Administrative Basic Act (행정기본법) Article 7-2, counting in international age, effective 2023-06-28 — checked 2026-11-03
- Korea Law Information Center: Civil Act (민법) Article 158, calculation and expression of age — checked 2026-11-03
- Korea Law Information Center: Elementary and Secondary Education Act (초·중등교육법) Article 13 and addendum (Act No. 8577) — checked 2026-11-03
- Korea Law Information Center: Military Service Act (병역법) Article 11, military service examination — checked 2026-11-03
- Korea Law Information Center: National Pension Act (국민연금법) Article 61 and addendum (Act No. 8541) Article 8, pension starting age by birth year — checked 2026-11-03
- Korea Law Information Center: Youth Protection Act (청소년 보호법), definition of youth (law text)
This is a reference summary; official guidance from the relevant institution takes precedence. The lunar new year dates come from Korea Astronomy and Space Science Institute data; dates before 1962 may differ by one day because of the standard-time difference at the time.