Rule Of 72s Estimator

This calculator requires the use of Javascript enabled and capable browsers. This script estimates by using the Rule of 72s how long it takes to double your investment at a given coumpound interest rate. The formula is 72 / Rate = Number of Years to Double your Investment. Enter the investment rate of return (interest rate) as a whole number. For instance 5 is equal to 5% but 5.5 is equal to 5 and a half percent; it is legitmate. Click on Calculate and see the estimated number of years required to double your investment. You may click on Clear Values and do another.

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