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The other way to say is if you expect 7.2% returns then amount of year it will take to double your money is approximately 10 years.
Rule of 72 applied for different rates expected to double your investment
Rule of 72 applied for different years expected to double your investment
Rule of 72 became famous because it helps us to calculate easily the approximate CAGR for double returns.
For other multiple returns or more accurate results it is better to use a calculator like our CAGR Calculator.
VALUE INVESTING GROWTH INVESTING FINANCIAL INDEPENDENCE FINANCIAL PLANNING Stock Market Course
Rule of 72
Rule of 72 is a method or formula by which you can calculate either
- Approximate rate of return you expect to double your money in X years OR
- Approximate Years it will take to double your money at X % rate of return.
The other way to say is if you expect 7.2% returns then amount of year it will take to double your money is approximately 10 years.

Rule of 72 applied for different rates expected to double your investment
Rate expected | Years to double |
---|---|
3 % | 24.0 years |
4 % | 18.0 years |
5 % | 14.4 years |
6 % | 12.0 years |
7 % | 10.3 years |
8 % | 9.0 years |
9 % | 8.0 years |
10 % | 7.2 years |
11 % | 6.5 years |
12 % | 6.0 years |
13 % | 5.5 years |
14 % | 5.1 years |
15 % | 4.8 years |
16 % | 4.5 years |
17 % | 4.2 years |
18 % | 4.0 years |
19 % | 3.8 years |
20 % | 3.6 years |
Years to double | Rate expected |
---|---|
3 years | 24 % |
4 years | 18 % |
5 years | 14.4 % |
6 years | 12 % |
7 years | 10.3 % |
8 years | 9 % |
9 years | 8 % |
10 years | 7.2 % |
11 years | 6.5 % |
12 years | 6 % |
13 years | 5.5 % |
14 years | 5.1 % |
15 years | 4.8 % |
16 years | 4.5 % |
17 years | 4.2 % |
18 years | 4 % |
19 years | 3.8 % |
20 years | 3.6 % |
For other multiple returns or more accurate results it is better to use a calculator like our CAGR Calculator.
VALUE INVESTING GROWTH INVESTING FINANCIAL INDEPENDENCE FINANCIAL PLANNING Stock Market Course
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