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Financial · Tool

Rule of 72 Calculator

Quickly estimate how long it takes your investment to double — just divide 72 by the annual interest rate.

Interest rate
%
Initial amount (optional)
$
Rule of 72 time—
Exact time—
Accuracy—
Doubling time
—
Rule of 72 estimate
Multiple doublings
# Years Multiple Amount
PNG · made in your browser, nothing uploaded
Related in Financial
50/30/20 Budget Rule → Actual Cash Value (ACV) → After-tax Cost of Debt → Amortization Calculator →
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