Age Calculator
Calculate your exact age from your birthdate.
Current Age
Next Birthday
About this tool
The age calculator finds your exact age in years, months, and days from your date of birth. It also shows total days lived, weeks, and months, plus the number of days until your next birthday. Useful for legal forms, retirement planning, school enrollment, or simple curiosity.
How to use
- Enter your date of birth using the date picker.
- The calculator instantly shows your age in years, months, and days.
- Review the totals for days, weeks, and months you have lived.
- Check the date and countdown for your next birthday.
- Change the date to compare ages of family members or friends.
Common use cases
- Filling in legal documents that require exact age.
- Tracking a child's precise age for school or vaccinations.
- Planning birthdays and milestone celebrations.
- Calculating retirement, pension, or insurance eligibility.
- Comparing ages between two people for relationships or genealogy.
Frequently asked questions
Q. Does this calculate Korean "age" or international age?
A. It uses the international (full-year) age standard, which is now also the official standard in Korea since 2023.
Q. Why is the day count off by one near my birthday?
A. The calculation is based on local time. Time zone differences between your device and birth location may cause a one-day shift.
Q. Can I calculate the age of someone who has passed away?
A. Use the date calculator instead — enter the birth date and the date of death to find the exact lifespan.
Q. Is leap day (Feb 29) handled correctly?
A. Yes. In non-leap years, the birthday rolls over on March 1 for age increment purposes.