# How accurate is the rule of 72?

By Nick

### Quick Peek:

Looking to double your investment? The Rule of 72 is a handy formula that can help you estimate how long it will take. Simply divide 72 by the interest rate of your investment to get an idea of potential growth. While it’s most accurate for compounded interest rates between 6% and 10%, it’s still a valuable tool for investors to make informed decisions. So, if you want to make your money work for you, give the Rule of 72 a try!

## Key Takeaways: Understanding the Rule of 72

Investing can be a tricky game, especially if you’re new to the field. However, there are a few simplified formulas that can help you make informed decisions and maximize your returns. One of these formulas is the Rule of 72.

The Rule of 72 is a quick and easy way to calculate how long it will take for your investment to double in value. All you need to do is divide 72 by the interest rate of your investment, and the result will be the number of years it will take for your investment to double.

### How Accurate is the Rule of 72?

The accuracy of the Rule of 72 depends on the interest rate of your investment. This formula is most accurate for interest rates that fall between 6% and 10%. For interest rates outside of this range, the Rule of 72 may not be as accurate.

However, it’s important to note that the Rule of 72 is designed to work with compounded interest rates. Compounded interest rates are interest rates that are added to the principal amount, creating a larger base for future interest payments. This means that the Rule of 72 may not be as accurate for simple interest rates.

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### Why is the Rule of 72 Useful?

The Rule of 72 is a valuable tool for investors because it allows them to quickly and easily estimate the potential growth of their investments. This can help investors make informed decisions about where to put their money and how long to keep it there.

For example, if you have an investment with a 7% interest rate, the Rule of 72 tells you that it will take approximately 10.3 years for your investment to double in value. This can help you plan for the future and make decisions about when to withdraw your funds.

### Final Thoughts

In conclusion, the Rule of 72 is a simple and useful formula for estimating the growth of your investments. While it may not be as accurate for interest rates outside of the 6% to 10% range, it is still a valuable tool for investors. By using the Rule of 72, you can make informed decisions about your investments and plan for your financial future.

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