Age calculator
Enter your date of birth and find your exact age, how many days and hours you have lived and how long until your next birthday. You can also calculate how old someone was or will be on any other date.
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How to use
- 1Pick your date of birth in the calendar.
- 2Keep “Today” as the reference date or choose another past or future date.
- 3See your exact age and the totals in months, weeks, days and hours.
- 4Check the weekday you were born and how long until your next birthday.
Use cases
- Know your exact age for forms, insurance or registrations.
- Work out how old someone will be on a specific date (retirement, coming of age).
- Celebrate fun milestones like your 10,000th day.
- Calculate an employee’s length of service or a pet’s age.
Frequently asked questions
How is exact age calculated?
Years, months and days are subtracted between the two dates. If the current day is lower than the birth day, a month is borrowed using the number of days in the previous month, just as you would by hand.
What if I was born on February 29?
In non-leap years your birthday is taken as February 28, the most common convention. Legally, some countries use March 1.
Can I calculate age on a future date?
Yes. Change the reference date to find out how old someone will be at any moment, such as when they retire.
Is my date of birth stored?
No. The calculation runs in your browser and no data is saved or sent.