Age Calculator
Find an exact age and the days until the next birthday.
Date you turn an age
Upcoming birthdays
The next 10 birthdays from the “Age on” date. Birthdays on a weekend are marked.
| Age | Date | Days left |
|---|---|---|
| 37 years old | Mon, May 17, 2027 | in 187 days |
| 38 years old | Wed, May 17, 2028 | in 553 days |
| 39 years old | Thu, May 17, 2029 | in 918 days |
| 40 years old | Fri, May 17, 2030 | in 1,283 days |
| 41 years old | Sat, May 17, 2031Weekend | in 1,648 days |
| 42 years old | Mon, May 17, 2032 | in 2,014 days |
| 43 years old | Tue, May 17, 2033 | in 2,379 days |
| 44 years old | Wed, May 17, 2034 | in 2,744 days |
| 45 years old | Thu, May 17, 2035 | in 3,109 days |
| 46 years old | Sat, May 17, 2036Weekend | in 3,475 days |
Age Calculator
The Age Calculator works out an age from a date of birth and a reference date, which is today unless you change it. Age starts at 0 and goes up by one on each birthday.
Age = reference year − birth year (− 1 if this year’s birthday has not come yet)
How to use
- Type the date of birth as eight digits (05171990) or pick it with the calendar button.
- The Age on date is today. Change it to see an age on another day.
- Read the age along with the exact years, months, and days, the next birthday, and the days lived.
South Korea switched to this way of counting in 2023
Korea traditionally used a counting age in which a baby is 1 at birth and everyone gets a year older on New Year’s Day. Since June 28, 2023, Korea’s Civil Act has required ages to be calculated from the date of birth in the way this calculator does.
| Born May 17, 1990, on March 1, 2026 | Age |
|---|---|
| International age | 35 |
| Korean counting age | 37 |
FAQ
Do I turn a year older on my birthday?
Yes. The age goes up by one on the birthday itself.
When does someone born on February 29 turn a year older?
In years without February 29, this calculator counts the birthday as March 1, the day after February 28.
How are the days lived counted?
It is the number of days between the date of birth and the Age on date. The day of birth counts as day 0.
Is my date of birth saved?
No. Dates are calculated in your browser and are never saved or sent to a server.
References
- Korea Law Information Center, Civil Act Article 158 (in Korean)
- National Institute of Korean Language, Standard Korean Dictionary: 세는나이 (in Korean)