Rule of 72 Calculator
Years [est] =
Rule of 72 is used to estimate the number of years required to double an investment.
- Interest/Year: interest per year expressed as a percentage
- Years [est]: estimated number of years to double an investment
Approximately how long will it take to double a $2,000 investment which yields 8% annual interest?
- Interest/Year: 8.000%
It will take approximately 9 years to double.