72er-Regel
Berechne, wie lange es dauert, eine Investition zu verdoppeln.
Eingabe
Jahre bis zur Verdopplung
Investition verdoppelt sich bis 2036
Teile 72 durch deine jährliche Rendite, um die Jahre bis zur Verdopplung deiner Investition zu schätzen.
Verdopplungs-Timeline
@ 7% jährliche Rendite
Anlagenvergleich
Inflationsauswirkung
Die 72er-Regel zeigt auch, wie schnell die Inflation die Kaufkraft erodiert. Bei 3% Jahresinflation verdoppeln sich die Preise in nur 24 Jahren.
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Using the Rule of 72 to Estimate Doubling Time
Überblick
The Rule of 72 is a quick mental shortcut for how long it takes an investment to double at a fixed annual return: just divide 72 by the rate. It is remarkably accurate for typical rates and great for sanity-checking growth without a spreadsheet. This calculator applies it instantly, and also works in reverse to find the rate needed to double in a given time.
So gehts (Schritt für Schritt)
- 1
Enter the annual rate
The expected yearly return or interest rate as a percentage.
- 2
Read the doubling time
The tool divides 72 by the rate to estimate years to double.
- 3
Or solve for the rate
Enter a target number of years to see what annual rate doubles your money in that time.
Funktionsweise
Years to double ≈ 72 ÷ annual interest rate (as a percent). At 8%, money doubles in about 9 years; at 6%, about 12 years. The 72 works because it closely approximates the exact logarithmic doubling formula for rates between roughly 4% and 15%. To find the required rate instead, divide 72 by the number of years you have.
Wann verwenden
Quickly estimating how fast savings will grow. Comparing the long-term impact of different return rates. Showing how inflation erodes purchasing power (how fast prices double).
Häufig Gestellte Fragen
Very close for rates between about 4% and 15%. At higher or lower rates the approximation drifts slightly from the exact figure, but it remains a useful estimate.
Wichtige Hinweise
The Rule of 72 is a rough mental-math approximation, not investment advice. Real returns are not fixed and are not guaranteed — consult a licensed financial advisor before making investment decisions.