How does the Rule of 72 work?

Divide 72 by the annual percentage return to estimate the lat to double. At 8%, money doubles in about 72/8 = 9 lat.

When should I use 70 or 69.3 instead?

72 is easiest for mental math and is most accurate around 6–10%. The 70 and 69.3 variants are closer for lower rates and continuous compounding.

Rule of 72 Kalkulator

Darmowy Rule of 72 kalkulator. Enter an annual return to estimate how many lat it takes your money to double, using the 72, 70 and 69.3 rules, alongside the mathematically exact doubling time.

Estimate how many lat it takes an investment to double.

t \approx \frac{72}{r}

Powiązane kalkulatory

Procent Składany Kalkulator

Oblicz how your savings grow over time with compound interest and regular contributions.

Inwestycja Return Kalkulator (ROI & CAGR)

Oblicz ROI and CAGR for any investment over any time period.

ROI Kalkulator

Oblicz your return on investment, annualized ROI (CAGR), and investment multiple.

Pożyczka Amortyzacja Schedule

Generuj a full amortization table for any loan with monthly payment, interest, and balance breakdown.