International, year, and overseas age
Enter a birth date to calculate age types for a reference date.
When to use this calculator
Calculate international age, year age, and Korean counting age from a birth date and reference date.
- Checking age on a past or future reference date
- Comparing different Korean age conventions
- Confirming whether a birthday has passed
Worked examples
International age
A person born on May 13, 2000 is 26 on July 11, 2026.
Year age
Year age uses reference year minus birth year.
Counting age
Traditional counting age uses year age plus one.
Frequently asked questions
Which age is used legally in Korea?
International age is generally used, but a specific law or program may state its own reference.
Can I choose a different reference date?
Yes. The result is calculated relative to the selected date.
What does overseas age mean?
It normally refers to international age, which changes on the birthday.
How to interpret the result
Always check the reference date stated by an institution.
Age limits may use year-based rules even when general age is calculated internationally.