Rule of 72 Calculator
A legendary mental math shortcut. See exactly how many years it will take your investment to double at a given interest rate.
Your Expected Return
At a 8% annual return, your money will double in exactly 9.0 years.
What is the Rule of 72?
The Rule of 72 is a simplified formula that calculates how long it'll take for an investment to double in value, based on its rate of return. You simply divide 72 by the annual rate of return. For example, if you earn 8% a year, 72 ÷ 8 = 9 years to double your money.
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