Find an exact age in years, months, and days between any two dates, plus totals in months, weeks, days, and hours, and a countdown to the next birthday.
How to use Age Calculator
Enter the date of birth.
Optionally change the "age at" date (defaults to today).
Read the exact age and totals.
Frequently asked questions
How is the exact age computed?
By calendar-correct stepping — borrowing days from the previous month and months from years — so it accounts for varying month lengths and leap years.