Age Calculator
Calculate exact age in years, months, and days.
Processed locally in your browser — your files never leave your device.
How to use
- 1Enter the date of birth.
- 2Click Calculate to see years, months, days, and total days.
Enter a date of birth to get the exact age in years, months, and days, plus the total number of days lived.
Frequently asked questions
How is the age computed?
Full calendar years and months are counted from the birth date to today, with remaining days added — the same way birthdays work.
Can I calculate age at a past date?
Yes. Change the “as of” date to compute the age on any specific day.