How age is calculated
The calculator compares your date of birth with today's date and returns your age in years, months and days. It also shows the total number of days and weeks you have lived.
Why the result can differ by a day
Age depends on the time zone and the exact time of birth. Most official forms only ask for the date, so a one-day difference between tools is normal and rarely matters.
Common uses
- Checking eligibility for exams, jobs or benefits with an age limit
- Filling forms that ask for exact age
- Curiosity about milestones such as your 10,000th day
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth and the tool subtracts it from today's date, giving years, months and days.
Does it handle leap years?
Yes, the calculation uses the real calendar, including leap years.
Can I calculate age on a future date?
This version compares against today. For a future date, use the date difference calculator.