Estimate how long it takes an investment to double with the Rule of 72. Enter any interest rate for an instant doubling-time answer, free.
Years to Double
10.3
Years to Double ≈ 72 / Interest Rate
Estimate how long it takes an investment to double with the Rule of 72. Enter any interest rate for an instant doubling-time answer, free.
Years to Double ≈ 72 / Interest Rate
At a 7% interest rate, years to double ≈ 72 / 7 = 10.3 years.
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