Rule of 72 Calculator
How long until your money doubles? Ollie counts pebbles while you wait.
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Rule of 72 FAQ
What is the Rule of 72?
It is a quick mental shortcut: divide 72 by your annual return to estimate how many years it takes your money to double.
Is the Rule of 72 exact?
It is a close approximation, most accurate for returns between 6% and 10%. For exact numbers use the compound interest calculator.
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