Calculation method
Calendar days are calculated from the birth date to today. Weeks are seven-day groups; hours are a date-level approximation unless exact birth time is also known.
Enter your birth date. Everything is calculated locally in your browser.
Turn your date of birth into elapsed days, weeks and hours for a more granular view of age than a birthday number alone.
Calendar days are calculated from the birth date to today. Weeks are seven-day groups; hours are a date-level approximation unless exact birth time is also known.
The day total is the cleanest exact date-level measure. Week and hour displays are alternative ways to express that same elapsed interval.
10,000 days equals 1,428 full weeks plus four days, which makes a hidden life milestone easier to visualise.
Exact hours since birth require an exact birth timestamp and time zone. The page does not pretend a date-only input contains that information.