Age Calculator
How old am I?
Find your exact age in years, months, and days based on your date of birth. You can also check your age on a past or future date, see how many days old you are, and view your next birthday countdown in the United States.
How age is calculated
Age is calculated by comparing your date of birth to the selected date. Leap years add an extra day to February, which affects exact day counts across years. The calculator accounts for varying month lengths and leap years to provide precise results.
Frequently asked questions
What is my age today?
Enter your date of birth and this page will show your age today in years, months, and days.
How many days old am I?
After calculating your age, you will also see your total age in days and weeks.
How old was I on this date?
Use the "Age at date" field to select any past date and the results will update instantly.
How old will I be on a future date?
Choose a future date and the calculator will show your age on that day, including your exact years, months, and days.
Does the calculator handle leap years?
Yes. Leap years add February 29, which affects day counts across years. The results update automatically based on the dates you choose.
I was born on February 29. When is my birthday in non-leap years?
Many people celebrate on February 28 or March 1. This page can still calculate your age correctly in every year.
Is this the same as chronological age?
Yes. The default result is chronological age based on dates.