Verified answer

http://www.deathclock.com/

Enjoy!

There is no way to truly "know when somone will die".

All those sites do is take the average life span of a human, and add or subtract various amounts of time based on your livelyhood.

In other words, say if you smoke they will subtract 5 years, but you exercise every day so they add 4 years. If you eat well they will add 3 years but if you drink, they remove 4. So on and so forth.

In other words, it is nothing more than an educated guess.

They estimate a date based on average life spectancy.