Age-in-days calculator
Select your birth date to count every full calendar day between that date and today, including leap days.
How old am I in days?
Turn your birthday into one satisfyingly large number.
Count your days
Leap years are included.
Choose your birthdayYour age in days will appear here.
How this calculator works
The calculator measures full calendar days from your selected birth date to the start of today. Your date stays in your browser and is not sent to a TimeGoblin account.
Years estimate
The smaller result uses the average Gregorian year length of 365.2425 days. Conventional age still changes on your birthday.
Common questions
Are leap years included?
Yes. The date difference naturally includes every February 29 in the interval.
Does birth time matter?
No. This calculator uses calendar dates, not the hour and minute of birth.
Is my birthday stored?
No. The calculation runs locally in your browser.