Rule of 72 Calculator
Years to Double Your Money
~10.3 years
72 ÷ 7% = 10.3
The Rule of 72 is a simplified approximation. Actual results depend on compounding frequency.
How It Works
The Rule of 72 is a quick mental math shortcut: divide 72 by the annual rate of return to estimate how many years it takes to double your investment. At 7% annual return, your money doubles in approximately 10.3 years (72 ÷ 7 = 10.3).
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