How it works: Enter your growth rate, year-5 multiple, and desired return, and this calculator works out the maximum price you should pay today to hit that return over 5 years. The multiple is pre-filled with the trailing 3-year average P/E (or P/FCF) and the desired return defaults to 15% — both are starting points you can adjust to your preference. For the growth rate, tap "Use" to drop in the trailing 3-year CAGR or the analyst forward estimate, or type your own assumption. Any price below the buy-below number clears your target.