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  • 3m.
 (37)
    Updated: March 8, 2013

      Rule of 72 Calculator

      How long would it take my money to double at the annual interest rate of

      72 /

      It will double in

      Learn more about how the rule of 72 works.

      Rule of 72 Calculator

      Investments have various interest rates, but the rule of 72 is the great equalizer. No matter your investment amount, this calculator can determine how many years it will take for it to double—all with the power of the number "72."

      Start
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