Free Online Age Calculator
Find your exact age down to the day. Enter your date of birth and optionally a target date to calculate age in years, months, and days. Bonus: discover your zodiac sign, birthstone, day of the week you were born, and more.
Fun Facts About Age and Time
How Exact Age Is Calculated
Calculating exact age involves more than simple subtraction. You need to account for varying month lengths (28–31 days), leap years (every 4 years, except centuries not divisible by 400), and the relationship between birth date and current date. Our calculator handles all of these edge cases to give you your precise age in years, months, and days — plus interesting stats like total days and weeks lived.
Zodiac Signs and Birth Day Facts
Your zodiac sign is determined by the position of the sun at your time of birth. The twelve signs span roughly month-long periods throughout the year. While astrology is a matter of personal belief, knowing your zodiac sign is a fun cultural touchpoint. Our calculator also tells you what day of the week you were born on — a piece of trivia that's surprisingly hard to figure out without a tool, since calendar patterns repeat in complex 400-year cycles.