How long will your money take to double?
The Rule of 72 is a quick shortcut: divide 72 by the yearly return to estimate how many years it takes to double your money. Here is the exact answer too.
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Rule of 72 estimate—
Exact time to double—
Time to grow 10×—
ValueAmount invested
For illustration only, at the rates you enter. Actual results will differ.
Get a free planHow it is calculated
Years to double = ln 2 ÷ ln(1 + r) ≈ 72 ÷ (rate in %)
The shortcut is close for rates between about 6% and 10%; the calculator also shows the exact figure.
Common questions
Why does it matter?
It shows how much the rate of return and time matter: at 6% money doubles in about 12 years, at 12% in about 6.
Does inflation affect this?
Yes. Use the return after inflation to see how long your buying power takes to double.
Is a high rate guaranteed anywhere?
No. Higher returns come with higher risk.
Mutual fund investments are subject to market risks; read all scheme-related documents carefully. Returns shown are illustrations at an assumed rate and are not guaranteed. Plenitude Connect is an AMFI-registered Mutual Fund Distributor (ARN-130934); these tools are for education and are not investment advice.
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