Rule of 72 Calculator
Calculate how long it takes to double your investment using the Rule of 72. Also includes Rule of 114 and Rule of 144.
Investment Details
8%
1%30%
$10,000
$1,000$1,000,000
10 years
1 years30 years
Years to Double (Rule of 72)
9.0 years
Exact: 9.01 years
Years to Triple
14.3 yrs
Exact: 14.27
Years to Quadruple
18.0 yrs
Exact: 18.01
Doubled Amount
$20,000
Tripled Amount
$30,000
Rate Needed to Double in 10 Years
Rule of 72 Estimate7.20%
Exact Rate7.18%
The Rule of 72
Years to Double = 72 / Interest Rate
Rule of 72
Years to 2x
Rule of 114
Years to 3x
Rule of 144
Years to 4x