Age calculator
Find out your exact age, how many days, weeks and months you have lived and how long it is until your next birthday.
Age calculator: what it is and how it works
Age is calculated by counting the full years since the date of birth: you are not a year older until your birthday. For your exact age, the remaining months and days are added, taking into account that months have different lengths.
This calculator gives your age as of today or any other date, for example to find out how old you will be on a given day or how old someone was at some point in the past. It also shows the total months, weeks and days lived, the weekday you were born and how many days are left until your next birthday. If you were born on 29 February, in non-leap years your birthday is taken as 1 March.
How to use it
- Enter your date of birth.
- Keep today’s date or choose another reference date.
- See your exact age and some fun facts.
Age = full years between the date of birth and the reference dateWorked example
Someone born on 15 June 1990 is, on 2 November 2026, 36 years, 4 months and 18 days old: they have lived 13,289 days and were born on a Friday.
Frequently asked questions
How is exact age calculated?
The full years since birth are counted first, then the months and days since the last birthday.
What if I was born on 29 February?
In non-leap years your birthday is usually taken as 1 March for legal purposes, and the calculator does the same.
Can I calculate my age on a future date?
Yes. Change the reference date to see how old you will be, for example on your retirement day.
How many days have I lived?
The calculator shows the exact total of days, weeks and months from your birth to the chosen date.