Rule of 72
로도 알려져 있음: Doubling Time Rule
t \approx \frac{72}{r}
t ≈ 72 / r계산 내용
A quick mental math shortcut to estimate how many years it takes for an investment to double at a given annual rate of return.
변수
| 상징 | 이름 | 설명 |
|---|---|---|
| t | Doubling Time | Approximate years for an investment to double |
| r | Annual Rate | Annual interest rate as a percentage (not decimal) |
실제 사례
1
t = 72 / 8 = 9 years결과: ~9 years
계산기를 사용해 보세요
관련 수식
#mental math#investing#doubling