Calculating the true value of your time is actually much harder than it sounds and far more powerful than it seems. The value of your time will likely change every year, perhaps even faster.

Are you wasting your, and your employees', time doing tasks that would be better off delegated? Here's how to do the math.

The article How to Calculate the Real Value of Money Using the CPI Formula originally appeared on Fool.com. Try any of our Foolish newsletter services free for 30 days .

Part of being financially stress-free is knowing how much money you may need in retirement. Although there's no cookie-cutter answer, there are good baselines and guidelines that can help.