Rule of 72: How Long to Double Money at 6%
How many years it takes to double an investment at a 6% annual return, using the Rule of 72.
At a 6% annual return, an investment doubles in approximately 12.0 years.
Years to double
12.0 years
at 6% p.a.
Related questions
It is roughly in line with a conservative debt-heavy portfolio or a bank fixed deposit in some periods, lower than typical long-term equity assumptions but useful as a cautious planning baseline.
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The Rule of 72 is an approximation, most accurate for rates between 6% and 10%. For a precise doubling time at any rate, use the Compound Interest Calculator.