Rule of 72 Calculator

Enter your expected annual return to see how many years it takes to double your money. The chart compares doubling times across common return rates.

About the Rule of 72

Divide 72 by your annual return rate to get the approximate number of years to double your investment. Simple, powerful, and surprisingly accurate for rates between 2-20%.

Instant doubling time calculation
2x, 3x, and 4x time estimates
Comparison chart across 11 return rates
Export chart as PNG
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