Korean Age Calculator
Enter your birthday to compare international age, traditional Korean age, and year age in one place.
Your age comparison will appear here
Choose your date of birth and press Calculate to see Korean age, international age, and year age.
Exact Age Calculator
Calculate your age in years, months, days, and seconds from your birthday.
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Compare your actual age with how old your face appears in a selfie or photo.
Try face age testKorean Age vs International Age
Korean age can be confusing because several age systems have been used in Korea. International age (the same system used in the United States and most countries) differs from traditional Korean age by one or two years. The calculator separates them so you can see the difference clearly.
Traditional Korean Age
You are considered 1 at birth, and everyone gains another year on January 1. Formula: current year - birth year + 1.
International Age
You start at 0 when born and gain one year on each birthday. This is now South Korea's official legal age system for most purposes.
Year Age
Year age is current year minus birth year. It starts at 0, but increases every January 1 instead of on your birthday.
Korean Age Formulas
If you need a quick mental calculation, use these formulas. The calculator above is better when you want exact birthday-aware international age and a side-by-side comparison.
Traditional Korean Age
current year - birth year + 1
This is the older cultural method: age starts at 1 at birth and increases every January 1.
From International Age
birthday passed: age + 1
birthday not passed: age + 2
Year Age
current year - birth year
Year age increases on January 1, but unlike traditional Korean age it does not start at 1.
Korean Age Examples
Quick Answers: Common Korean Age Searches
These answers assume you are starting from international age. Your exact result depends on whether your birthday has already passed this year.
How old is 13 in Korean age?
14 or 15
Usually 14 if your birthday has passed, or 15 if it has not passed yet.
How old is 14 in Korean age?
15 or 16
Usually 15 if your birthday has passed, or 16 if it has not passed yet.
How old is 15 in Korean age?
16 or 17
Usually 16 if your birthday has passed, or 17 if it has not passed yet.
How old is 16 in Korean age?
17 or 18
Usually 17 if your birthday has passed, or 18 if it has not passed yet.
How old is 18 in Korean age?
19 or 20
Usually 19 if your birthday has passed, or 20 if it has not passed yet.
How old is 19 in Korean age?
20 or 21
Usually 20 if your birthday has passed, or 21 if it has not passed yet.
How old is 20 in Korean age?
21 or 22
Usually 21 if your birthday has passed, or 22 if it has not passed yet.
How old is 25 in Korean age?
26 or 27
Usually 26 if your birthday has passed, or 27 if it has not passed yet.
How old is 30 in Korean age?
31 or 32
Usually 31 if your birthday has passed, or 32 if it has not passed yet.
How to Ask Age in Korean
Many searches for Korean age are connected to Korean learning, K-pop profiles, and K-drama character ages. These simple phrases help connect the number to real usage.
How old are you?
몇 살이에요?
A common casual-polite way to ask someone's age.
I am 20 years old.
저는 스무 살이에요.
Use 살 after the age number when saying age in Korean.
K-pop profile tip
Older idol profiles may mention Korean age, while newer official contexts are more likely to use international age after the 2023 change.
The Korean Age System: Does Korea Still Use It?
The Korean age system counted everyone as 1 at birth and added a year every January 1. For most legal and administrative purposes, South Korea switched to international age on June 28, 2023. That means documents, government services, and most official situations now use the same birthday-based age system used in many other countries.
Traditional Korean age has not disappeared from everyday conversation. People may still mention it in cultural discussions, older content, entertainment profiles, or informal explanations. That is why a Korean age calculator is still useful: it helps translate between the systems without guessing.
For legal questions such as drinking age, military service, school rules, or official eligibility, check the specific rule and do not rely only on traditional Korean age.
Korean Age Calculator FAQ
What is Korean age?
Traditional Korean age starts at 1 when a person is born and increases by 1 every January 1. This makes Korean age usually one or two years higher than international age.
How do you calculate Korean age?
The common traditional formula is Korean age = current year - birth year + 1. International age starts at 0 at birth and increases on each birthday.
Does South Korea still use Korean age?
Since June 28, 2023, South Korea officially uses international age for most legal and administrative purposes. Traditional Korean age may still be used casually in conversation.
What is year age in Korea?
Year age counts the difference between the current year and birth year. It starts at 0 at birth and increases every January 1, so it differs from both traditional Korean age and international age.
How old am I in Korean age?
If you know your international age, traditional Korean age is usually international age + 1 if your birthday has passed this year, or international age + 2 if your birthday has not passed yet.
Can I use Korean age for legal age questions?
Do not rely on traditional Korean age for legal eligibility. South Korea standardized international age for most legal and administrative purposes on June 28, 2023, and specific rules can still vary by context.
How old is 20 in Korean age?
If your international age is 20, your traditional Korean age is usually 21 if your birthday has passed this year, or 22 if your birthday has not passed yet.
How do you ask how old are you in Korean?
A common casual-polite way to ask someone's age is '몇 살이에요?' You can answer with your age plus 살, such as '저는 스무 살이에요' for 'I am 20 years old.'
How does Korean age work?
In the traditional Korean age system, a baby is considered 1 year old at birth. Everyone then gains one year on January 1, regardless of their actual birthday. This means your Korean age can be one or two years higher than your international age depending on whether your birthday has passed.
Why is Korean age different from American age?
Korean age differs from American age (international age) because it starts counting at 1 instead of 0 and increases on January 1 rather than on your birthday. A person born in December could be called 2 years old in Korean age just days after birth.
How old is Jungkook in Korean age?
Jungkook of BTS was born on September 1, 1997. In 2026, his traditional Korean age is 30 (2026 − 1997 + 1), while his international age is 28 (turning 29 in September). Since the 2023 law change, official Korean contexts use international age.
How old is 15 in Korean age?
If your international age is 15, your traditional Korean age is usually 16 if your birthday has passed this year, or 17 if your birthday has not passed yet.
References and Notes
This calculator is for general reference. South Korea's official legal age system changed to international age on June 28, 2023, but casual usage may vary by context.