Age Calculator
Calculate exact age or the time between two dates in years, months, days and total days. Great for birthdays and milestones.
The selected leap-day rule is used for both completed years and the next birthday.
- Enter valid dates to see 10,000-day, 20,000-day and whole-year milestones.
current year − birth year + 1; it is shown here only as a cultural comparison, not as South Korea’s current legal age.
Pregnancy timeline? Due date calculator · days between dates: Date difference · leap years: Leap year checker.
Calculate exact age
Exact years/months/days, UTC-based civil-day totals, a policy-consistent next birthday, life milestones, and a privacy-conscious report — shareable as an image.
FAQ
How is age calculated?
It uses civil calendar dates, completed-year anniversaries and month-end clamping. For a February 29 birth date, you can choose whether non-leap-year birthdays fall on March 1 or February 28.
What are the fun stats?
Total days, approximate hours lived and a playful heartbeat count (72 bpm average) — just for perspective, not medical data.
What is Korean age?
Traditional 세는 나이 (counting age) adds 1 to the birth year and everyone ages on January 1. It is shown only as a cultural comparison, not as South Korea’s current legal age.
Is my data stored?
No. The private input panel is excluded from URL sharing and local storage, and exported reports omit the full date of birth by default.
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