# How to do Rule of 72 math?

By Nick

### Quick Peek:

Want to know how long it will take to double your money? The Rule of 72 can help. Simply divide 72 by the interest rate you expect to earn on your investment to find out how many years it will take. But keep in mind that this rule assumes a consistent rate of return and doesn’t consider taxes or inflation. Still, it’s a useful tool for understanding compounding and achieving financial goals. So, give it a try and see how long it will take for your money to grow!

## What is the Rule of 72?

The Rule of 72 is a simple calculation that can help you estimate the time it takes to double your money. It’s a useful tool for investors who want to know how long it will take to reach their financial goals. The formula is straightforward: divide 72 by the interest rate you expect to earn on your investment, and the result is the number of years it will take for your money to double.

### How to do Rule of 72 math?

The Rule of 72 is easy to use and can be done with a simple calculator. To calculate the number of years it takes to double your money, follow these steps:

Step 1: Determine the interest rate you expect to earn on your investment.

Step 2: Divide 72 by the interest rate.

Step 3: The result is the number of years it will take for your money to double.

For example, if you expect to earn a 6% return on your investment, divide 72 by 6 to get 12. This means it will take 12 years for your money to double.

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### Why is the Rule of 72 important?

The Rule of 72 is important because it helps you understand the power of compounding. Compounding is when you earn interest on your interest, which can significantly increase your returns over time. By using the Rule of 72, you can see how long it will take for your money to grow and reach your financial goals.

### Limitations of the Rule of 72

While the Rule of 72 is a useful tool for estimating the time it takes to double your money, it has some limitations. It assumes that your investment will earn a consistent rate of return over time, which may not always be the case. Additionally, it doesn’t take into account taxes or inflation, which can significantly impact your returns.

## In conclusion

The Rule of 72 is a simple and effective way to estimate the time it takes to double your money. By using this calculation, you can better understand the power of compounding and how long it will take to reach your financial goals. However, it’s important to remember that the Rule of 72 has some limitations and should be used as a general guideline rather than an exact calculation.

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