⏱️ Rule of 72 Calculator
Divide 72 by a yearly return to estimate how many years it takes money to double. This calculator shows the quick estimate and the exact answer side by side.
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How to use the rule of 72 calculator
- Enter a yearly return in %.
- Read the Rule of 72 estimate and the exact doubling time.
Strategies that use this tool
Buy and Hold Index Investing
Buy and hold index investing means owning low-cost funds that track a whole market and keeping them for the long run. Instead of hunting for winners, you own a slice of everything and let broad economic growth do the heavy lifting.
🌱Dividend Growth Investing
Dividend growth investing focuses on companies with a track record of paying and steadily raising their dividends. The goal is a growing stream of income that can be reinvested now and spent later.
Frequently asked questions
What is the Rule of 72?
A shortcut: years to double ≈ 72 ÷ yearly return %.
How accurate is it?
It is very close for returns between about 4% and 15%.
Can I use it for inflation?
Yes – it also estimates how fast prices double at a given inflation rate.