Want to know how long it will take your money to double? The Rule of 72 is a simple mental math shortcut that helps you estimate how many years it’ll take for an investment to double at a fixed annual rate of return. In this quick video, I’ll show you how it works, when it’s most useful, and what to watch out for when applying it to real-life financial planning.
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Growing Wealth · January 28, 2026
Rule of 72 Explained - How Long for your Investments to Double
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