Age calculator
Enter a date of birth to see the exact age today, or on any date you choose, plus the next birthday.
35 years old
35y 7m 17d · Thu, Jan 1, 2026
- Year age36
- Korean counting age37
- Next birthday in134 daysFri, May 15, 2026
- Day of lifeDay 13,016
How to use
- Pick the date of birth. The “age on” date starts as today.
- Change the “age on” date to see the age on another day. Press Today to go back.
- The large number is the age in completed years. Below it are the year age, the old Korean counting age and the days to the next birthday.
- Press Share link to send the result. The date of birth is stored in the link.
FAQ
How is age calculated?
Age starts at 0 on the day of birth and goes up by one on each birthday. Take the current year minus the birth year, then subtract one more if this year’s birthday has not come yet.
What is Korean age, and does South Korea still use it?
In the traditional Korean counting age, a baby is 1 at birth and everyone gets a year older on January 1, so it equals the year age plus one. Since June 28, 2023, the revised Korean Civil Act and the country’s basic law on public administration state that age is counted in completed years from birth, the same as international age, unless another law says otherwise. A few laws, such as the Youth Protection Act and the Military Service Act, still use the year age.
When does someone born on February 29 get a year older?
In years without February 29, this calculator counts the birthday as March 1. Legal rules differ by country, so check the rule that applies to you when it matters.
Is my date of birth stored?
No. The calculation runs in your browser and nothing is sent to a server. If you press Share link, the date of birth is put inside the link itself.
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