Age Calculator
Find your exact age in years, months, and days. Also shows total days lived, total weeks, and time until your next birthday.
Age
0 years
📐 Formula
Age in Years = Year(today) − Year(birth), adjusted if birthday has not yet occurred this year
Frequently Asked Questions
Subtract the birth year from the current year, then adjust based on whether the birthday has occurred yet this year. For exact age in months and days, also compare the birth month and day to today's date.
September 9 is statistically the most common birthday in the US, followed by other September dates. This reflects a peak in December conceptions. February 29 (leap day) is the rarest birthday.
Multiply your age in years by 365, add the days for each extra month, then add extra days. Alternatively, use this calculator — it calculates the exact number of days between your birth date and today.