About the Age Calculator
Enter a date of birth to find the exact age in years, months and days. You also get the total number of months, weeks, days and hours lived, the day of the week you were born and a countdown to your next birthday. You can also calculate age on any past or future date.
How to use the Age Calculator
- Enter the date of birth.
- Keep today as the "age at" date, or choose another date.
- See the exact age and details instantly.
Features
- Exact age in years, months and days
- Total months, weeks, days and hours
- Countdown to the next birthday
- Day of the week you were born
- Handles leap years and 29 February birthdays
How age is calculated
The calculator counts complete years first, then complete months, then the remaining days, which is the same method used on official forms. Leap years are handled automatically, and people born on 29 February celebrate on 28 February in non-leap years.
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth and the calculator shows your age in years, months and days as of today, or as of any date you choose.
Can I calculate age on a specific date?
Yes. Change the "Age at" date to see how old someone was or will be on that day, which is useful for school admissions and exam eligibility.
How are leap years handled?
Leap years are counted exactly. For a 29 February birthday, the next birthday in a non-leap year is shown as 28 February.
Is my date of birth stored?
No. The calculation runs in your browser and nothing is saved or sent anywhere.