How Many Days Have I Been Alive
Which equation is used to determine how long it lasts? Not using an online calculator?
(Year of Birth) * 365 + (Year of Birth) / 4) + DB
DB = day distance. If this is your day, add your day, otherwise count your days.
As accurate as possible.
Day to live calculator
365x number of years + 30x number of months. This is very close if you want the exact number. You need to find the day in each month (calendar) of each month from the last month to today and also see how many leap years there are. One day off in February for a leap year.
(Current year, year of birth) * 365 + (current year, year of birth) / 4) + birthday distance