World of Engineering(@engineers_feed ):The Rule of 72 is a great mental math shortcut to estimate the effect of any growth rate, from quick financial calculations to population estimates. Here’s the formula: Years to double = 72 / Interest Rate Examples: At 6% interest, your money takes 72/6 or 12 years to double. To double your money in 10 years, get an interest rate of 72/10 or 7.2%.

World of Engineering

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World of Engineering@engineers_feed

2025.05.03 17:30

The Rule of 72 is a great mental math shortcut to estimate the effect of any growth rate, from quick financial calculations to population estimates. Here’s the formula: Years to double = 72 / Interest Rate Examples: At 6% interest, your money takes 72/6 or 12 years to double. To double your money in 10 years, get an interest rate of 72/10 or 7.2%.