Simple, eh? Average Life Expectancy is 78.6 years.
Maybe not that simple. That 78.6 is the average for men and women for persons born in 2010. Since you weren't born in 1910, is there another way of looking at age?
Try this:
https://www.infoplease.com/life-expectancy-birth-race-and-sex-1930-2010
It's the average life expectancy based birth year. Much ado about nothing, except that you might want to see how you're doing compared to the odds.
For example, if you were born around 1960, your average life expectancy would be age 70.
In my case, when I was born, life expectancy, would be 62.(now 83)
Yes... averages are meaningless, but can give a sense of perspective.
An aside... this year, for the second year in a row, life expectancy will be shorter than the year before.
https://fortune.com/2018/02/09/us-life-expectancy-dropped-again/