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February 10, 20265 min read
The Rule of 72 and Other Financial Hacks to Double Money
By Surya Prakash
Financial Analyst & Editor
The Rule of 72
The Rule of 72 is a quick shortcut to estimate how long it will take to double your money at a given interest rate. Divide 72 by the annual return rate (e.g., at 6% return, it takes 72/6 = 12 years to double).
Rules of 114 and 144
- Rule of 114: Tells you how long it takes to triple your money (divide 114 by the interest rate).
- Rule of 144: Tells you how long it takes to quadruple your money (divide 144 by the interest rate).
Why These Rules Help
These mental math hacks help you quickly evaluate investment opportunities and understand the impact of different interest rates on your wealth without using calculators.
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