How old are you exactly, down to the day? Enter your date of birth below and our free exact age calculator will show your age in years, months and days, plus how many weeks, days and hours you have been alive and how long until your next birthday.
How the exact age calculator works
The calculator counts completed years first, then completed months, then the remaining days, the same way ages are counted on official documents. It also handles leap years and months of different lengths. Want to know how old you were on a particular day, like your wedding or your graduation? Just fill in the second date.
What is Korean counting age?
In traditional Korean counting, a baby is 1 year old at birth and everyone gets a year older on January 1. That is why K-pop idols were often listed one or two years older in Korea than abroad. South Korea switched to international age for official use in June 2023, but you will still see the old system in older articles. Read more on our how we calculate ages page.
Age units at a glance
| Unit | Roughly equals |
|---|---|
| 1 year | 12 months, 52 weeks, 365 or 366 days |
| 1 month | 28 to 31 days |
| 1 week | 7 days, 168 hours |
| 1 day | 24 hours, 86,400 seconds |