Amount doubles in bank ( FD )

The time it takes for your money to double in a bank depends on the interest rate.

There is a simple formula called the:

📌 Rule of 72

Years to double = 72 ÷ Interest Rate

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🔹 Examples

Interest Rate	Years to Double
4%	72 ÷ 4 = 18 years
5%	72 ÷ 5 = 14.4 years
6%	72 ÷ 6 = 12 years
7%	72 ÷ 7 = 10.3 years
8%	72 ÷ 8 = 9 years

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🏦 In Regular Banks (India example)

• Savings account: 2.5% – 4% → Money doubles in 18–28 years

• Fixed Deposit (FD): 6% – 8% → Money doubles in 9–12 years