Rule of 72
How many years money takes to double at a rate of return, by the rule and exactly.
Rule of 72
How many years money takes to double at a rate of return, by the rule and exactly.
10.3 years
Doubles in about
10.24 years
Exactly
20.5 years
Quadruples in
It works the other way too: at 3% inflation, prices double in about 24 years, so money kept as cash buys half as much. The rule is closest between about 6% and 10%.
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