The average American worker estimates that about $1.46 million is necessary to retire comfortably, according to a recent Northwestern Mutual survey. And even this may be a little optimistic for some. While baby boomers said they'd probably need less for retirement, Gen X, millennials, and Gen Z all expect to need more for their futures -- as much as $1.65 million.

Saving that kind of cash isn't easy, even with decades to do it. So it shouldn't come as a surprise that workers of all generations are in danger of coming up short. Let's look at how each generation is doing and what you can do to increase your odds of meeting your retirement savings goal.

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Source Fool.com