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Rule of 72 Calculator
How long money takes to double, triple, and quadruple.

Your Rate

Drag the slider — the times update instantly.

Annual RateThe average yearly return you assume — your choice, not a DhanRadar prediction
1%30%
Doubles In
6.0 yrs
At 12% a year (Rule of 72)
Triples In
9.5 yrs
Rule of 114
Quadruples In
12.0 yrs
Rule of 144
Exact Doubling
6.1 yrs
Precise (ln 2 / ln(1+r))
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How the Rule Works

Divide 72 by the rate for a quick doubling time. At 12% that is 6.0 yrs — close to the exact 6.1 yrs. The rule is a handy shortcut, accurate enough for rates in the usual 4–15% range.

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AI Insights

DhanRadar AI

At 12% a year, money roughly doubles in 6.0 yrs, triples in 9.5 yrs, and quadruples in 12.0 yrs.

Small rate changes compound — even 2% more a year noticeably shortens the doubling time. Slide the rate to see how much.

For education only — not investment advice. These are arithmetic doubling times at the rate you assumed; real returns vary and are not guaranteed.

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Calculations are estimates for illustration only and assume a constant annual return, which real markets do not provide. DhanRadar is a research & analytics platform, not an investment advisor. Mutual fund investments are subject to market risks.