Leap day birthdays are typically celebrated on Feb 28 or March 1 in non-leap years. This calculator handles leap years correctly in all date calculations.

Enter your birthday above. A 30-year-old is approximately 10,950–10,980 days old depending on leap years lived through.

Yes — just enter their date of birth. Use the "Custom date" option to find their age on any specific date in the past or future.