Kostenloser 72er-Regel-Rechner

Schaetzen Sie ab, wie lange es dauert, Ihr Geld bei einem bestimmten Zinssatz zu verdoppeln, mithilfe der 72er-Regel.

%

Years to Double

9.0

Exact Years (ln2/r)9.01

Years to Double vs Annual Interest Rate

Formel anzeigen →

Formel

## 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%.

Lösungsbeispiel

Your investment earns 8% annually.

  1. 01Rule of 72: 72 / 8 = 9.0 years
  2. 02Exact: ln(2) / ln(1.08) = 0.6931 / 0.07696 = 9.01 years