Rule of 72 Calculator

Discover how long it takes for your money to double! The Rule of 72 is a simple formula to estimate doubling time for investments.

Calculate Your Doubling Time

Common rates: Savings Account (3-4%), Fixed Deposit (6-7%), Mutual Funds (8-12%), Stocks (10-15%)

Doubling Time Result

9.0 years

Time to Double Your Money

Initial Amount:₹1,00,000
Doubled Amount:₹2,00,000
Growth:100%

Rule of 72 Accuracy:

100.0% accurate

Most accurate for rates between 6-10%

Understanding the Rule of 72

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Simple Formula

Years to Double = 72 ÷ Interest Rate

72 ÷ 8% = 9.0 years
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Quick Estimation

Get instant doubling time estimates without complex calculations

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Investment Planning

Perfect for comparing different investment options and setting goals

Real-World Examples

6%
Fixed Deposit
12.0 years to double
8%
PPF/ELSS
9.0 years to double
12%
Mutual Fund SIP
6.0 years to double
15%
Stock Market
4.8 years to double

💡 Smart Tips for Indian Teens

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Start Early

At 8% return, ₹10,000 becomes ₹20,000 in 9 years, ₹40,000 in 18 years!

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Compare Options

Use the Rule of 72 to quickly compare FD (12 years) vs Mutual Funds (9 years)

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Goal Setting

Want to double money in 6 years? You need 12% returns (Rule: 72÷6=12)

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Inflation Impact

If inflation is 6%, your purchasing power halves in 12 years!