How to Use
Enter your birth date in the designated field.
Optionally adjust the calculation date to find your age at any other point in time.
Instantly view your exact age in years, months, and days.
Check your countdown to your next birthday along with detailed lifetime statistics.
What Is This Tool?
An age calculator computes the exact difference between a birth date and today - or any target date - in years, months, and days. Edge cases make this more complex than simple subtraction: leap year birthdays, the Korean age system, and legal age milestones that vary by country.
Why It Matters
Exact age matters in many legal and medical contexts. School enrollment cutoffs use precise age-on-a-specific-date rules that vary by district and country, determining whether a child enters a grade a full year ahead or behind peers. Pediatric medical dosing for children under two years old uses age in months, not years.