# Quick Answer: What Is The Rule Of 72 Formula?

## 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.

## Where did the rule of 72 come from?

From Colin’s comment on Hacker News, the Rule of 72 works because it’s on the “right side” of 100*ln(2) . This series expansion is the Calculus Way of showing how far the initial estimate strays from the actual result. The first correction term 12rlog(2) 1 2 r log ⁡ is small but grows with r.

## Does the rule of 72 really work?

The Rule of 72 – Why it Works

69 by one hundred, so that the interest rate can be expressed as a percent instead of a decimal). It isn’t an estimate – it’s the exact answer for doubling your money, assuming that the interest is compounded continuously. It’s valid for any value of r.

## What is Rule No 72 in finance?

The Rule of 72 is a quick, useful formula that is popularly used to estimate the number of years required to double the invested money at a given annual rate of return. Alternatively, it can compute the annual rate of compounded return from an investment given how many years it will take to double the investment.

## How can I double my money in 3 years?

The rule can tell you how fast you can double your money. Divide 72 by the interest rate at which you are compounding your money, and you will arrive at the number of years it will take to double in value. For instance, you money will double in 3 years if you are compounding at 24 per cent (ie 72/24 = 3 years).

## Why is Rule 72 important?

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.

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

To use the rule of 72, divide the number 72 by an investment’s expected annual return. The result is the number of years it will take, roughly, to double your money.

## What will \$5000 be worth in 20 years?

How much will an investment of \$5,000 be worth in the future? At the end of 20 years, your savings will have grown to \$16,036. You will have earned in \$11,036 in interest.

## Why does rule of 70 work?

The rule of 70 is a means of estimating the number of years it takes for an investment or your money to double. 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.

## How much interest does 10000 earn a year?

Interest calculator for a \$10k investment. How much will my investment of 10,000 dollars be worth in the future?

Interest Calculator for \$10,000.

RateAfter 10 YearsAfter 30 Years
0.00%10,00010,000
0.25%10,25310,778
0.50%10,51111,614
0.75%10,77612,513

54 more rows

## How do you double a dollar?

If you divide your expected annual rate of return into 72, you can find out how many years it will take you to double your money. Let’s say, for example, that you expect to get returns of 10 percent a year. Divide 10 into 72, and you discover the number of years it takes you to double your money, which is seven years.

## How many years FD will double?

Fixed Deposit: Currently, banks are offering an interest rate of around 6.25 per cent per annum on deposits with a maturity period of more than five years. Invest in an FD now and it will take 11 years for the money to double.