Deciding when to buy and sell stocks is difficult enough - figuring the profit or loss from that trade shouldn't have to be. Ex-Dividend.com has provided this stock calculator to help you simplify the process! Just enter the number of shares, your purchase price, your selling price, and the commission fees for the trade and the calculator instantly figures your resulting profit or loss after commission fees. Use your tab key to move from field to field. Click below the box to help convert fractions to decimals.