You Are Older Than You Think

Birthdays only tell you the years. But your life is measured in moments.

Check Your Stats

See exactly how many seconds you have been alive.

Age Calculator

Milestones You Missed

We celebrate turning 18 or 21, but what about the hidden milestones?

  • 1 Billion Seconds: Happens around 31.7 years old.
  • 10,000 Days: Happens around 27.4 years old.
  • 500 Months: Happens at 41 years and 8 months.

The Chronological Age

Your chronological age is simply the time elapsed since birth. Your Biological Age is how fast your body is aging compared to the average. Stress, diet, and exercise can make your cells "younger" or "older" than your driver's license says.

Comparing Eras

Calculating age difference helps put history in perspective.
Cleopatra lived closer in time to the Moon Landing than to the building of the Great Pyramid.
The T-Rex lived closer in time to Humans than to the Stegosaurus.

Age FAQs

Traditionally, Koreans were considered 1 year old at birth, and everyone turned a year older on New Year's Day. However, South Korea officially adopted the international age system in 2023.