Here is an interesting thought that Keeps me up sometimes at night, permit me to share. Please try to read to the end and drop your thoughts/comments too as well.

Say for instance, you are 30 years of age. When converted to hours, 30 years will give you 262,974.6 Hours exactly ( that is, you have spent 262,974.6 Hours on this earth). If you stick to the ideal sleeping time ( 7-9 hours of night sleep), multiply that by the number of days in 30 years which is 10,950 days, it will give you the approximate total number of hours you have been asleep for the 30 years you have been alive.

Approx time of daily night sleep x Number of days in 30 calendar years = Approx total time Asleep in 30 calendar year.
(9 hours sleep x10,950 days) = 98,550 hours sleep.

If you subtract the approximate total number of hours you have been asleep from the total hours you have been alive ( that is in 30 years), you will get the approximate total of the time you have been Awake.

Total time (hrs) in 30yrs - Approx total time (hrs) asleep = Approx total time (hrs) awake in 30 years.
(262,974.6 - 98,550) = 164,424.6 hours awake

If you convert this figure in Hours  back to years,
164,424.6 hrs ≈ 18 years 7 months 7 days.

Wow. It means you have only been active for 18 plus years of your life.

(Now imagine you sleep a lot, exceeding the 9hrs mark at night and usually the type to take long naps during the day?)

Do the Maths, Use your age and the approximate to get your own values, lol. Your will be shocked and thrown into thoughts.