How Many Seconds Have I Been Alive?

Just enter your date of birth (and birth time) to see how many seconds have passed since you were born. It also shows elapsed days, hours, minutes, and weeks at a glance, perfect for birthdays and anniversary fun facts.

Input

Date of birth

YYYY/MM/DD

Time of birth (optional)

Reference date

YYYY/MM/DD

Reference time

Leaving the birth time blank treats it as 00:00. The reference date and time default to the moment you opened this page.

Result

Enter your date of birth and a reference date and time. The result cannot be calculated when the reference is earlier than the date of birth.

How it works

Enter your date of birth to see how many seconds have passed since you were born. The reference date and time default to the moment you open the page.
Add your birth time for a more precise count of elapsed seconds. If you do not know the time, leave it blank and it is treated as 00:00.
Besides the total seconds, the tool also shows elapsed days, hours, minutes, and weeks so you can use whichever unit suits your purpose.
Set the reference date and time to a future moment to see 'how many seconds until then,' or to a past milestone to find 'how many seconds had passed back then.'
The result cannot be calculated when the reference date and time is earlier than your date of birth. Please check the order of the dates and times.
It also works as a handy guide when you want to celebrate a milestone such as your billionth second alive.

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