Korean Age Calculator
Enter your birth date to see your age expressed in three different systems: international, traditional Korean (+1), and the 2023 Korean legal standard.
Defaults to today—change it to plan for future events.
Birth date: Friday, July 14, 1995
Reference date: Tuesday, November 25, 2025
International age
30
(Birthdays add +1)
Traditional Korean age
31
Age = (Current Year − Birth Year) + 1
2023 Korean legal age
31
Age on Jan 1 = Birthday happened?
Days until next birthday: 231 day(s)
Calendar year difference: 30 year(s) between birth and reference year
How to Use This Calculator
Enter your birth date
Use the calendar picker for precise day/month/year input.
Set a reference date
Keep today’s date for current age or choose a future event date to see how old you will be then.
Review each age system
Compare international, traditional Korean, and modern (2023) Korean legal age rules.
Formula
International Age = Current Year − Birth Year − (Birthday passed? 0 : 1)
Traditional Korean Age = Current Year − Birth Year + 1
2023 Korean Age = Current Year − Birth Year + (Birthday passed? 1 : 0)
Example: Born 1995-07-14, reference 2025-11-09 → International age 30 • Traditional Korean age 31 • 2023 Korean legal age 31.
Why Korean Age Differs
Historically, Koreans considered newborns one year old at birth and added a year every New Year’s Day. In 2023, South Korea standardized most legal records to the international system, but many people still reference the traditional count.
- International age is used worldwide for passports, apps, and academic requirements.
- Traditional age appears in cultural contexts, family gatherings, and historical documents.
- The 2023 Korean legal age aligns with international age but sometimes factors in January 1 transitions.
- Knowing all three helps avoid confusion when filling out forms or conversing with locals.
Frequently Asked Questions
Why is my traditional age higher?
Traditional Korean age starts at 1 (instead of 0) and increases on January 1, so it’s usually one or two years older than international age.
Does everyone in Korea use international age now?
Legally, yes—most official documents use international age. Socially, some people still mention their Korean age out of habit.
How do I calculate the age for future dates?
Select a future reference date. The calculator adjusts ages and shows how many days remain until the next birthday.
Is the traditional age the same as Chinese lunar age?
They’re similar but not identical. Chinese lunar age often depends on lunar birthdays, while Korean age increments every January 1.