Official age system used in Korea today.
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Korean Age Calculator
Enter your birth date to calculate Korean age, international age, and Korea's year age system.
Korea officially uses International Age today, also known as "man nai" in Korean.
Old Korean age system: 1 year old at birth, plus 1 year every January 1.
Current year minus birth year. Sometimes used in age-restricted contexts.
Which one is used in Korea today?
Korea uses the international age system for most official and legal purposes today. The traditional Korean age system was abolished for official use on June 28, 2023, but Korean age can still appear in conversation, entertainment, K-pop idol profiles, and older culture guides. Year age may still matter for some age-restricted contexts such as legal drinking age in Korea.
Korean age vs international age
- Use this Korean age calculator to compare traditional Korean age, international age, and year age.
- International age is the legal standard for most official forms and documents in Korea.
- For age-restricted topics, check whether the rule uses international age or Korea's year age system.
Why Korea can show three different ages
Korea historically used a unique age-counting system in everyday life, where a person was considered one year old at birth and gained a year every New Year rather than on their birthday. In 2023, Korea standardized official and legal ages to the international system, but you may still hear Korean age in casual conversation.
This calculator shows your international age, traditional Korean age, and year age so you can quickly understand which number someone means. The difference can matter when reading older culture guides, entertainment profiles, drinking age references, school-year cohorts, or form instructions.
What each age result means
International age is your actual age since birth and is the standard used for most official and legal purposes in Korea today. Traditional Korean age counts birth as one and adds one year every January 1. Calendar-year age is current year minus birth year and may still appear in some age-limit contexts.
Korea officially uses international age for most legal and administrative purposes. However, some age-related rules may still depend on the specific law, institution, or context. For alcohol, tobacco, school-year, youth-protection, or eligibility rules, check the exact requirement before relying on one age number.
Korean Age Calculator FAQ
What is Korean age?
Korean age is the traditional age-counting method where a person is 1 year old at birth and gains 1 year every January 1.
Does Korea still use Korean age for official documents?
Korea uses international age for most official and legal purposes today, including most legal documents. Korean age can still appear in conversation, culture content, and older explanations, so follow the age wording requested by the organization or form.
How do I calculate Korean age?
In the traditional Korean age system, subtract your birth year from the current year and add 1.
What is international age in Korea?
International age is the standard age used in most countries. It starts at 0 on your birth date and increases on each birthday.
What is year age in Korea?
Year age is the current year minus your birth year. It may still be used in some age-restricted contexts.
Why did Koreans become younger in 2023?
On June 28, 2023, Korea moved official age counting to the international age system, so many people became one or two years younger on documents and official records.
What age system is used for drinking and smoking in Korea?
Some age-restricted rules can use year age, so check the current rule for the specific situation instead of relying only on traditional Korean age.