Rule of 72
Aussi connu sous le nom: Doubling Time Rule
t \approx \frac{72}{r}
t ≈ 72 / rCe qu'il calcule
A quick mental math shortcut to estimate how many years it takes for an investment to double at a given annual rate of return.
variables
| Symbol | Nom | Description |
|---|---|---|
| t | Doubling Time | Approximate years for an investment to double |
| r | Annual Rate | Annual interest rate as a percentage (not decimal) |
Exemples travaillés
1
t = 72 / 8 = 9 yearsRésultat: ~9 years
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Formules associées
#mental math#investing#doubling