# Question: Is The Rule Of 72 Accurate?

The Rule of 72 is a simple way to determine how long an investment will take to double given a fixed annual rate of interest.

In reality, a 10% investment will take 7.3 years to double ((1.10^7.3 = 2).

The Rule of 72 is reasonably accurate for low rates of return.

## Does the rule of 72 really work?

What is the Rule of 72? The Rule of 72 is a quick and easy way to see how long it will take your money to double at a given interest rate. You take 72 and divide it by the interest rate. So for example, if you are earning 2% it will take 36 years for your money to double (72/2).

## What is the 7 year rule for investing?

The rule says that to find the number of years required to double your money at a given interest rate, you just divide the interest rate into 72. For example, if you want to know how long it will take to double your money at eight percent interest, divide 8 into 72 and get 9 years.

## What is the difference between the rule of 70 and the Rule of 72?

The rule of 70 and the rule of 72 give rough estimates of the number of years it would take for a certain variable to double. When using the rule of 70, the number 70 is used in the calculation. Likewise, when using the rule of 72, the number 72 is used in the calculation.

## What is the rule of 72 examples?

The rule of 72 is a method used in finance to quickly estimate the doubling or halving time through compound interest or inflation, respectively. For example, using the rule of 72, an investor who invests \$1,000 at an interest rate of 4% per year, will double their money in approximately 18 years.

## How do you prove the rule of 72?

In finance, the rule of 72, the rule of 70 and the rule of 69.3 are methods for estimating an investment’s doubling time. The rule number (e.g., 72) is divided by the interest percentage per period (usually years) to obtain the approximate number of periods required for doubling.

## How can I double my money in 10 years?

The Rule of 72 states that the amount of time required to double your money equals 72 divided by your rate of return. For example: If you invest money at a 10 percent return, you will double your money every 7.2 years.

## How can I double my money in 5 years?

This is the number of years it will take for your money to double. For example, if your money is earning an 8 percent interest rate, you’ll double your money in 9 years (72 divided by 8 equals 9). Or, if your money is earning a 5 percent interest rate, you’ll double it in 14.4 years (72 divided by 5 equals 14.4).

## What is the rule of 100 in investing?

For years, a commonly cited rule of thumb has helped simplify asset allocation. It states that individuals should hold a percentage of stocks equal to 100 minus their age. So, for a typical 60-year-old, 40% of the portfolio should be equities.

## What’s the rule of 7?

The Rule of 7 is a marketing principle that states that your prospects need to come across your offer at least seven times before they really notice it and start to take action. Your prospects can be exposed to your offer significantly more than seven times, but they need to see it at least seven times.