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International age calculator

Enter a birth date to calculate your international age (official age), calendar-year age, Korean age, and zodiac animal. Free.

Date of birth

Reference date (default: today)

Age calculation basis

International age — (This year − birth year) if your birthday has passed, otherwise −1. Since June 2023, this is Korea's Official agestandard.
Year age — This year − birth year. Used in some laws, such as those on military service and youth protection.
Korean age — 1 at birth, +1 each New Year (the old Korean way).

What is Korean Age Calculator?

Enter only your date of birth and this calculator tells you your “man” (international) age, your year age, your traditional Korean counting age, and your zodiac animal all at once. Since Korea's June 2023 “unified age law,” contracts, paperwork, and welfare criteria all switched to the international age, so it is often confusing exactly how old you are. You can check your precise age as of today without counting by hand.

How it works

1 Select or enter your date of birth.
2 Based on today's date, your international age, year age, counting age, and zodiac animal are calculated instantly.
3 Also check the days remaining until your next birthday, and pick the age basis that fits your paperwork or eligibility.

Frequently Asked Questions

What are international age, year age, and counting age? ⌄

International (man) age counts your birth day as 0 and adds a year on each birthday — the official age. Year age is “this year minus birth year,” used in some laws such as military service and youth protection. Counting age is the old way that starts at 1 at birth and adds a year every New Year.

How is my international age calculated? ⌄

If this year's birthday has already passed, it is “this year minus birth year”; if not yet, it is one less than that. The calculator handles this automatically based on today's date.

Which age is used in contracts? ⌄

Unless stated otherwise, the legal standard — international age — is used. Some recruitment notices specify the “year age,” so it helps to also check the year age shown alongside.

Is my date of birth sent anywhere? ⌄

No. All calculation happens entirely in your browser, and the date you enter is not transmitted to or stored on any server.