Born in 1998 — age in 2026: 27 to 28
Someone born in 1998 is 29 by Korean counting age in 2026, 28 by year age, and 27 before this year’s birthday or 28 after it by international age. International age is the one on documents and in law.
- Counting age (세는 나이)29
2026 − 1998 + 1. Everyday usage until 27 June 2023.
- Year age (연 나이)28
2026 − 1998. What conscription and the alcohol and tobacco age go by.
- International age (만 나이)27 before the birthday · 28 afterthe legal age today
Full years lived. The legal default since 28 June 2023.
Born in 1998: year of the Tiger (Muin)
The zodiac follows the lunar year, so a birth in January or early February 1998, before Seollal, belongs to the previous year’s Ox.
School years and milestones
| Elementary school entry | March 2005 |
|---|---|
| Middle school entry | March 2011 |
| High school entry | March 2014 |
| Final year of high school | 2016 |
| University entry | March 2017 |
| Turns 20 (year age) | 2018 |
School entry in 2005 fell under the early-birthday rule, so January–February births may have entered a year earlier (2004). From the 2009 entry, everyone born in the same year enters together.
Age right now by month of birth (as of September 2026)
| Born in January | 28 |
|---|---|
| Born in February | 28 |
| Born in March | 28 |
| Born in April | 28 |
| Born in May | 28 |
| Born in June | 28 |
| Born in July | 28 |
| Born in August | 28 |
| Born in September | 27 before the birthday · 28 after |
| Born in October | 27 |
| Born in November | 27 |
| Born in December | 27 |
Age in another year
FAQ
Why are the three ages for 1998 all different?
Counting age starts at 1 at birth and rises every 1 January, giving 29 in 2026. Year age is 2026 − 1998 = 28. International age is 27 or 28 depending on whether the birthday has passed. All three are correct; they are used for different things.
Which age applies since the 2023 unification?
From 28 June 2023 Korean law and administration use international age unless a statute says otherwise, so a 1998-born person appears as 27 before and 28 after the birthday on 2026 paperwork. Laws that count by year age — conscription, the Youth Protection Act — still use 28.
Does the early-birthday rule affect people born in 1998?
Yes. Up to the 2005 school entry, January–February births started school with the cohort born the year before, so someone born in January or February 1998 may be in the same school year as those born in 1997. The table above assumes a March–December birth.
What is the zodiac animal for 1998?
The Tiger — Muin in the sexagenary cycle. The zodiac follows the lunar year, so a birth before Seollal in January or early February 1998 counts as the previous year’s Ox. The exact Seollal date is in the lunar converter.