Planning tool
Money doubler
Find out when your money doubles — and what rate gets you there faster.
Money doubler estimates how many years a sum takes to double at a yearly return, and the return you would need to double it in a set number of years. It uses the Rule of 72, explained further down the page.
Nothing you enter here is stored.
The yearly percentage your investment is expected to grow.
Your money doubles in
10.3 years
at 7% per year
Work backwards
Set a target number of years and see the rate you'd need.
Rate needed
7.2% per year
How different rates compare
The Rule of 72
Divide 72 by your annual return to estimate how long it takes to double your money. Simple and surprisingly accurate between 2% and 20%.
This is a planning estimate based on a constant annual rate. Actual investment returns vary, and past performance is not a guarantee of future results.
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