Age Calculator
Find your exact age in years, months, days, and more.
How to use the age calculator
- Enter your date of birth.
- Optionally change the 'as of' date (defaults to today).
- View your exact age plus extra stats like total days lived and days until your next birthday.
Enter your date of birth to calculate your exact age in years, months, and days, plus your total age in days, weeks, and hours, and the number of days until your next birthday.
How exact age is worked out
Your age in years is the number of full birthdays you've had. The leftover months and days are counted from your last birthday up to today, which is why the result can differ by a day or two from a simple 'days ÷ 365' estimate. Leap years are taken into account.
Age calculations are useful for forms and applications with age requirements, planning milestone birthdays, or working out someone's age on a specific past or future date, such as a school start date or a retirement date.
Frequently asked questions
How is age calculated exactly?
The calculator counts full years, months, and days between your date of birth and the selected date, accounting for different month lengths and leap years.
Can I calculate someone's age on a future or past date?
Yes, change the 'as of' date field to any date to see the age on that specific day.
What if I was born on February 29?
In non-leap years, your birthday is usually counted on February 28 or March 1 depending on the country. This calculator counts full years from your actual date of birth.
How many days old am I?
Enter your date of birth and the calculator shows your total age in days, weeks and hours alongside your age in years.