Bankrate on MSN

Rule of 72: What it is and how to use it

Here’s how the Rule of 72 works: Divide 72 by your expected annual interest rate (as a percentage, not a decimal). The answer is roughly the number of years it will take for your money to double. For ...
Investopedia

How Do I Use the Rule of 72 to Calculate Continuous Compounding?

Sean Ross is a strategic adviser at 1031x.com, Investopedia contributor, and the founder and manager of Free Lances Ltd. Anthony Battle is a CERTIFIED FINANCIAL PLANNER™ professional. He earned the ...