Rule of 72 works best with rates between 6-10%
Years to Double (Rule of 72)
0
Years to Double (Exact Calculation)
0
Initial Investment
$0
Doubled Amount
$0
Rule of 72 Formula
Years to Double = 72 ÷ Interest Rate
| Rate | Rule of 72 | Exact | Difference |
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How to Use Rule of 72 Compound Interest Calculator
- Enter investment amount and annual interest rate in the provided fields.
- Calculator instantly shows doubling time using both Rule of 72 and precise formula.
- View comparison table demonstrating accuracy across different interest rates.