The formulas
- Days lived = today − date of birth (your birth day is day 0)
- Weeks lived = days lived ÷ 7, rounded down
- Current week of life = weeks lived + 1
If you count the day you were born as day 1, add one. Just pick a convention and stick to it.
Spreadsheet formulas
| What | Formula (birth date in A1) |
|---|---|
| Days lived | =TODAY()-A1 |
| Weeks lived | =INT((TODAY()-A1)/7) |
| Age in years | =DATEDIF(A1,TODAY(),"Y") |
| Your 10,000th day | =A1+10000 |
| Your 2,000th week | =A1+2000*7 |
Finding milestone dates
10,000 days arrives at about 27 years and 4 months; 20,000 days at about 54 years and 9 months. In weeks, 1,000 weeks is about 19 and 2,000 weeks about 38. Unlike birthdays, these dates are different for everyone, which makes them fun to mark.
Seeing it in the app
Which week you are living
The card at the top of the Calendar tab in Life Calendar shows "2095 weeks lived so far" and the days left this week.
Days left and lived so far
Life counters on the Life tab show days left, hours slept so far and more, all derived from your birth date and life expectancy.
FAQ
Which calendar is the birth date in?
Enter your date of birth in the ordinary (Gregorian) calendar.
I don’t know my exact birth date.
An approximate date still gives you a grid, but weekdays and week numbers will be off, so correct it later if you can.
Life Calendar
No sign-up, and your birth date and records stay on your phone. Free on Android.