If you’re the kind of person who hates Mondays, I’ve done some math for you. The average life expectancy in the United States is about 78-years-old, meaning you have 4,056 weeks to be alive in total. That’s it, 4,056. And if you’re reading this post, you have less than 4,056 because you’re not a newborn. Let’s look at the math and see what you’ve got left.