How Long to Double Money at 12% – Rule of 72
At a 12% annual return, your money doubles in exactly 6 years according to the Rule of 72.
How to use this tool
- Enter annual rate in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your years to double and the full breakdown beneath it.
Apply the Rule of 72 to find that a 12% annual return doubles your money in exactly 6 years.