Why the Price Tag Isn't the Value
A stock trades at $180. Is that expensive? You have no idea yet, and neither does the person who sold it to you. Price is what the market is asking today. Intrinsic value is what the business is actually worth based on the cash it will earn. The whole game of value investing is finding the gap between the two.
This calculator uses an earnings growth model, the same logic behind a discounted cash flow analysis but built around earnings per share. You give it four things: today's EPS, a growth rate, the number of years you expect that growth to last, and a terminal P/E multiple the market is likely to assign once growth normalizes. The tool projects EPS forward, multiplies the final year by the terminal multiple to get a future price, then discounts that price back to today using your required rate of return.
Here is a worked example. Suppose a company earns $6.00 per share today, you expect 10% annual earnings growth for 10 years, and a terminal P/E of 18. Projected EPS in year 10 is roughly $15.56. Multiply by 18 and the future price is about $280. Now discount that back 10 years at a 10% required return: divide by 1.10 to the 10th power, which is about 2.59. Intrinsic value lands near $108 per share. If the stock trades at $180, the model says you are paying a steep premium over what the math supports.
The discount rate is doing heavy lifting here. Raise your required return from 10% to 12% and that same $280 future price shrinks to roughly $90 today, a 17% haircut from changing one assumption. This is the uncomfortable truth: intrinsic value is not a single number handed down from the market. It is a range that shifts with the assumptions you feed it, which is exactly why running the calculation yourself beats trusting a headline price target.
Notice what the model deliberately ignores. It does not care what the stock did last week or what a pundit predicts for next quarter. It cares about earnings, growth, and time. That focus is a feature, not a bug. Short-term price swings are driven by sentiment that washes out over a decade, while the cash a business throws off is what ultimately anchors its value. By forcing you to commit to a growth rate and a holding period, the calculator turns a fuzzy gut feeling about a company into four explicit, defensible numbers you can revisit and revise.
Famous investors anchor everything on this gap. The point is never to nail the value to the penny. The point is to buy only when the market price sits comfortably below your estimate, leaving room to be wrong and still come out ahead. When the gap is wide, you have a candidate worth deeper research. When the market price already sits above your most generous estimate, the honest move is to pass and wait, no matter how compelling the story sounds.