Age Calculator
Calculate international age from birthdate
About this tool
Age Calculator computes your international age (full years since birth) from your date of birth. In Korea, a traditional "counting age" system was used where everyone is 1 at birth and gains a year every January 1 — this tool shows both for comparison. Enter your birthday and get your exact age instantly.
How to use
- Select your date of birth (year, month, day).
- Your international age and Korean counting age are displayed immediately.
- You can also see how many days remain until your next birthday.
FAQ
What is the difference between international age and Korean counting age?
International age starts at 0 and increases by 1 on each birthday. Korean counting age starts at 1 at birth and adds 1 every January 1st. Since June 2023, Korea officially uses international age for legal purposes.
What is "year age"?
Year age is simply the current year minus the birth year, regardless of whether your birthday has passed. It is used in certain Korean laws such as military service regulations.
Is the calculation accurate?
Yes. The calculator accounts for leap years and varying month lengths to give a precise result. All calculations run in real time in your browser.
Results are for reference only. Please verify with official sources