Calculadora de la Regla del 72 Gratis
Usa la regla del 72 para estimar cuánto tiempo tarda en duplicarse tu dinero según la tasa de interés. Cálculo rápido y sencillo.
%
Years to Double
9.0
Exact Years (ln2/r)9.01
Years to Double vs Annual Interest Rate
Fórmula
The Rule of 72
Years to Double ≈ 72 / Interest Rate
This is an approximation. The exact formula is:
Years = ln(2) / ln(1 + r)
The Rule of 72 is most accurate for rates between 6% and 10%.
Ejemplo Resuelto
Your investment earns 8% annually.
- 01Rule of 72: 72 / 8 = 9.0 years
- 02Exact: ln(2) / ln(1.08) = 0.6931 / 0.07696 = 9.01 years
Preguntas Frecuentes
Why is it called the Rule of 72?
72 is used because it is easily divisible by many common interest rates (1, 2, 3, 4, 6, 8, 9, 12) and provides a close approximation.
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