Simply divide 72 by the compound annual rate of return on
the investment. The result is the number of years it will take to
double your investment.
For example, if the rate is 12%, divide 72 by 12.
The investment will double in approximately 6 years.
of 72 Calculator lets you input a rate to determine the
number of years, or you can input the number of years to determine the
approximate rate required to double your investment.
Check out our other calculators.
Revised: August 09, 2015