Simply divide 72 by the Annual Interest Rate and this is the time it will take you to double up your money.

For e.g.:- If you Invest 10,000 at 8% p.a., it will take you 9 years (72/8), to double up your money.

The above Rule is an approximation.

## How long will it take to double my money?

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.

## 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).

## How many years FD will double in SBI?

For domestic deposits – Less than Rs. 1 cr

Maturity Period | Deposit Amount | Interest Rate |
---|---|---|

Senior Citizen | ||

7 days to 45 days | Less than Rs. 1 cr | 6.25 |

46 days to 179 days | Less than Rs. 1 cr | 6.75 |

180 days to 210 days | Less than Rs. 1 cr | 6.85 |

5 more rows

## How long does it take for 401k to double?

For example, if you invest $10,000 at 10 percent compound interest, then the “Rule of 72” states that in 7.2 years you will have $20,000. You divide 72 by 10 percent to get the time it takes for your money to double. The “Rule of 72” is a rule of thumb that gives approximate results.