Age Calculator
Your exact age down to the day, total days lived, and how long until your next birthday.
How exact age is calculated
Age counts completed calendar units: full years first, then full months since the last birthday, then leftover days, borrowing from the calendar the same way long subtraction borrows digits. That's why someone born January 31 turns 'one month old' on the last day of February, not March 3.
Leap year birthdays
Born February 29? In common years this calculator (like most jurisdictions) uses February 28 as the birthday. You still age one year per year, you just only get the real date once every four.