Tools
Rule of 72 calculator
See how long it may take for money to double at an assumed rate of return. Educational only — not a performance promise or investment advice.
Estimated years to double
9.0
At 8% per year, the Rule of 72 estimates about 9 years for money to double (72 ÷ 8).
Formula: 72 ÷ rate of return. Actual results vary with markets, fees, taxes, and contributions.
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