At time of writing I can averagely expect to live for 10306 more days.
As a 50 year old male, I need to plan to live to 79.
As a 40 year old, plan to live to 77.8. I’m guessing the difference is that you’ve survived this far so your life expectancy improves marginally as you get older. Aka, you don’t always reach 50 and those that do are survivors ?