Rule of 69 Calculator
Estimate how long it takes for your money to double with continuous compounding using the Rule of 69.
🔹 What is the Rule of 69?
The Rule of 69 is a simple formula used in finance to estimate the time required for an investment to double under continuous compounding. Unlike the Rule of 72 or 70, which are commonly used for annual compounding, the Rule of 69 is more accurate for continuous growth.
🔹 Formula
Time (in years) = 69 ÷ Interest Rate Example: If your investment grows at 12% continuously, the time to double is ≈ 69 ÷ 12 = 5.75 years.
🔹 Why Use It?
- Helps investors plan long-term goals effectively.
- Quick estimation without complex calculations.
- Useful in continuous compounding scenarios like certain bonds and reinvestment models.
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