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The Rule of 72 is a rule of thumb that **investors can use to estimate how long it will take an investment to double**, assuming a fixed annual rate of return and no additional contributions.

The Rule of 72 is a **calculation that estimates the number of years it takes to double your money at a specified rate of return**. If, for example, your account earns 4 percent, divide 72 by 4 to get the number of years it will take for your money to double. In this case, 18 years.

dividing 72 by the interest rate will **show you how long it will take your money to double**. How many years it takes an invesment to double, How many years it takes debt to double, The interest rate must earn to double in a time frame, How many times debt or money will double in a period of time.

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. By **dividing 72 by the annual rate of return**, investors obtain a rough estimate of how many years it will take for the initial investment to duplicate itself.

One of those tools is known as the Rule 72. For example, let's say you have saved $50,000 and your 401(k) holdings historically has a rate of return of 8%. 72 divided by 8 equals 9 years until your investment is estimated to double to $100,000. ... The Rule of 72 suggests that **only takes 3.6 years**.

In a less-risky investment such as bonds, which have averaged a return of **about 5% to 6%** over the same time period, you could expect to double your money in about 12 years (72 divided by 6).

If you want to double your money in 5 years, then you can apply the thumb rule in a reverse way. **Divide the 72 by the number of years in which you want to double your money**. So to double your money in 5 years you will have to invest money at the rate of 72/5 = 14.40% p.a. to achieve your target.

The Rule of 72 was **discovered by Albert Einstein** and he considered it his greatest discovery even over E=MC2 (Squared). He considered it the most powerful force on earth. In its simplest form Einstein explained it this way. When you invest money, you earn interest on your capital.

The Rule of 72 is an easy way to estimate how long before an investment doubles. **Simply divide the interest rate by 72 to determine the number of years it will take to double**. The Rule of 72 is an easy way to estimate how long it will take for an investment to double, given a fixed annual interest rate.

The Rule of 72 is explains the miracle of compounding interest. It is alleged that Albert Einstein referred to compound interest as the “most powerful force in the universe” or the “greatest mathematical discovery.” However, no proof can be found that Einstein ever mentioned the Rule of 72, **much less invented it**.

The most basic example of the Rule of 72 is one we can do without a calculator: Given a 10% annual rate of return, how long will it take for your money to double? Take 72 and divide it by 10 and you get 7.2. This means, at **a 10% fixed annual rate of return, your money doubles every 7 years**.

The 50-20-30 rule is a money management technique that divides your paycheck into three categories: **50% for the essentials**, 20% for savings and 30% for everything else. 50% for essentials: Rent and other housing costs, groceries, gas, etc.

The Rule of 69 is used to estimate the amount of time it will take for an investment to double, assuming continuously compounded interest. The calculation is **to divide 69 by the rate of return for an investment and then add 0.35 to the result**.

How To Use the Rule of 72 To Estimate Returns. Let's say you have an investment balance of $100,000, and you want to know how long it will take to get it to $200,000 without adding any more funds. With an estimated annual return of 7%, you'd divide 72 by 7 to see that your investment will double **every 10.29 years**.

If you do not understand it you can follow this. Return on investment is 9% annually. Since this is compounded semiannually calculation should be done by **every six months**. We will have to do this process until we reach 3 which means amount has tripled.

-If the interest rate is 10 percent, it will take 72/10 = 7.2 × 3 = **21.6 years** to double—exactly half the time. (You can check that your calculations are approximately correct using the future value formula.

Although books by high-school teachers and college professors and articles by bloggers and financial advisers have credited **Einstein** with discovering the Rule of 72, the calculation has been around for more than 500 years.

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.

The rule of 70 is a **calculation to determine how many years it'll take for your money to double given a specified rate of return**. The rule is commonly used to compare investments with different annual compound interest rates to quickly determine how long it would take for an investment to grow.

Variations on the Rule of 72

Variations on the rule also tend to get used because the rule of 72's accuracy is best limited to a small number of low rates of return. It's most accurate at an 8% interest rate, with **6-10%** being its most accurate window.

In this speech, he cited Einstein: “**Compound interest is the 8th wonder of the world”**. “Compound interest is the most powerful force in the universe.” It sounds a bit more like Einstein, as the universe is involved.

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.

- Savings accounts. Recently, the falling repo rate regime has brought the savings account interest rates to an average of 2-4%. ...
- Liquid funds. ...
- Short-term and ultra-short-term funds. ...
- Equity Linked Saving Schemes (ELSS) ...
- Fixed deposit. ...
- Fixed maturity plans (FMPs) ...
- Treasury bills. ...
- Gold.

- 401(k) or employer retirement plan.
- A robo-advisor.
- Target-date mutual fund.
- Index funds.
- Exchange-traded funds (ETFs)
- Investment apps.

- Invest with a robo-advisor.
- Invest with a broker.
- Do a 401(k) swap.
- Invest in real estate.
- Build a well-rounded portfolio.
- Put the money in a savings account.
- Try out peer-to-peer lending.
- Start your own business.