Some 44% of retirement savers in their 20s and 30s say they want to retire by 60, according to a recent survey from the World Economic Forum. Some investors have multiple 401(k) accounts from multiple jobs, and others are saving in other types of accounts, such as individual retirement accounts or regular brokerage accounts. Still, there's no doubt that many younger Americans currently aren't on track to retire at the current full retirement age of 67, let alone at 60. Here's how financial pros say you can calculate whether or not you'll be able to retire when — and how — you want. Then assume a withdrawal rate — what you're going to take out every year while, hopefully, your investments continue to grow.

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Persons: you've, you'd, Russell Gaiser, Christine Benz, Critics Organizations: Taco Bell, Economic, CNBC, Fidelity, Morningstar, Benz