Age Calculator
Calculate your exact age in years, months, days, and even hours from your date of birth, or the age on any specific date.
Enter a date of birth to see the exact age.
How the Age Calculator works
Enter a date of birth and, optionally, a different reference date. The calculator finds the full number of years, months, and days between the two dates — handling varying month lengths and leap years correctly — then also shows your age in total months, weeks, and days, plus a countdown to your next birthday.
Frequently asked questions
How is exact age calculated?
We calculate the full years, months, and remaining days between your date of birth and the selected date, accounting for different month lengths and leap years.
Can I calculate someone's age on a future or past date?
Yes — change the "Age as of" field to any date to see how old someone was, or will be, on that day.
Why does my age in days seem so high?
Total days counts every single day you've been alive, so even at a young age the number adds up quickly — a 30-year-old has lived roughly 10,950 days.