Age Calculator
Enter a date of birth to see your exact age in years, months and days, plus total days lived and the countdown to your next birthday. Free and instant.
Calculate your exact age
How to use the Age Calculator
- Pick your date of birth.
- Leave the second date as today, or change it to find your age on any other date.
- Click Calculate age.
- Read your age in years, months and days, the totals in months, weeks and days, and the date of your next birthday.
Frequently asked questions
How do you calculate exact age?
Subtract the birth date from the target date year by year, then month by month, borrowing the length of the previous month when the day count goes negative. The result is whole years, months and days.
How many days old am I?
Enter your birth date and the tool shows total days lived. It counts the actual days between the two dates, so leap days are included.
What happens if I was born on February 29?
In years that are not leap years, this calculator treats February 28 as your birthday for the next-birthday countdown.
Can I find my age on a past or future date?
Yes. Change the second date to any day, for example a school cutoff or an eligibility deadline, and the tool shows your age on that date.
Is my date of birth stored?
No. The calculation happens in your browser and nothing is sent or saved.