Want to know the three main business valuation formulas? A valuation formula is used to determine what is the company worth.Here are 10 best calculations to help your business valuation. The Interactive Business Valuation Calculator can provide you with a rough idea of the value of your business. Learn how business valuation works, including how to use SDE to calculate a basic business valuation. Learn why business valuation can be important, the key factors that affect business valuations, and how to best estimate valuations. This business evaluation calculator uses your current operating profit, expected annual growth, and the length of time you expect to grow at this rate. When trying to evaluate a company, it always comes down to determining the value of the free cash flows and discounting them to today. Add up the value of everything the business owns, including all equipment and inventory. Subtract any debts or liabilities.