Rule of 72
Även känd som: Doubling Time Rule
t \approx \frac{72}{r}
t ≈ 72 / rVad den beräknar
A quick mental math shortcut to estimate how many years it takes for an investment to double at a given annual rate of return.
variabler
| Symbol | Namn | Beskrivning |
|---|---|---|
| t | Doubling Time | Approximate years for an investment to double |
| r | Annual Rate | Annual interest rate as a percentage (not decimal) |
Arbetade exempel
1
t = 72 / 8 = 9 yearsResultat: ~9 years
Prova en kalkylator
Relaterade formler
#mental math#investing#doubling