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About Rule of 72
What this tool does
Investing calculators compute dividend yield, P/E ratio, earnings per share, market capitalization, portfolio allocation, dollar-cost-average outcomes, the rule of 72, and compound growth projections.
Why use this tool
Sound investing requires understanding valuation metrics and growth projections. Quickly comparing the P/E ratios of two stocks, or modeling how monthly contributions grow over 30 years, helps you make data-driven decisions.
How it works
Dividend yield divides annual dividends by share price. P/E divides price by earnings. Compound growth applies the future-value formula FV = PV(1 + r)^n. Dollar-cost averaging simulates periodic purchases at varying prices.
Pro tip
The rule of 72 is a quick mental shortcut: divide 72 by the annual return to estimate how many years it takes to double your money. At 8% annually, your investment doubles in about 9 years.
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