Free Tool
Korean Age Calculator
Enter a birth date and reference date to calculate international age, annual age, Korean counting age, birthday countdown, and birth-year zodiac.
International Age
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Annual Age
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Korean Counting Age
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Days Until Birthday
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Birth-Year Zodiac
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2026 Age Reference Table
Age depends on both the birth date and the reference date. Use this table as a quick 2026 reference.
| Lookup | Rule | Note |
|---|---|---|
| International age in 2026 | 2026 - birth year, minus 1 before birthday | Birthday status matters |
| Annual age | 2026 - birth year | Used by some Korean legal systems |
| Korean counting age | 2026 - birth year + 1 | Mostly conversational |
| 18 or 19 threshold | Check whether the birthday has passed | Different rules may use different age bases |
| Zodiac | Quick birth-year reference | Lunar and solar-term rules can differ |
International, Annual, and Korean Age Calculator
The age calculator computes international age, annual age, Korean counting age, days until the next birthday, and birth-year zodiac from a birth date and reference date.
International age calculator
Uses birthday-based age
The calculator subtracts one year when the birthday has not passed on the reference date.
Annual age calculator
Reference year minus birth year
Annual age ignores whether the birthday has passed and is used by some age-based rules.
Korean counting age
Reference year minus birth year plus one
Korean counting age starts at one in the birth year and increases at the new year.
Birth-year zodiac
Quick zodiac by birth year
The zodiac result is a birth-year reference and may differ when lunar calendar or solar-term rules are applied.
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Age Calculator FAQ
How is international age calculated?
It subtracts the birth year from the current year and subtracts one if this year’s birthday has not passed.
Can I change the reference date?
Yes. Enter a reference date to calculate age as of that specific date. If it is blank, today is used.
What is annual age?
Annual age is the reference year minus the birth year. It does not check whether the birthday has passed.
Does it show Korean counting age?
Yes. Korean counting age is shown as current year minus birth year plus one.
Is the zodiac exact?
The zodiac is a quick birth-year reference. It may differ if lunar calendar or solar-term rules are applied.
What date is used when the reference date is blank?
The calculation uses the current browser date.