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Rule of 72 Calculator
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Compound annual rate of return
Number of years for investment to double
Input your rate- see approximately how many years it will take for your investment to double.
Input number of years - see approximately what rate is needed to double your investment in that time.
The Rule of 72 provides approximate results.  Below are exact results calculated using the above rates and years.
Investment amount
Value at end of period

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 Revised: October 26, 2023


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