Email Marketing ROI Calculator is an online tool to calculate the Return on Investment from the amount one invested in email marketing campaign. Email marketing is nowadays turned one of a prominent marketing idea to promote or run your business successfully. This is direct marketing strategy in the context of internet advertising used to reach the potential audiences where the advertisers are charged for cost per contact. Such amount spending on email marketing usually referred to advertiser's investment. To monitor how effectively an investment on email marketing in order to reach potential audiences, one should calculate the ROI. The ROI is the measurement by which one can calculate how much revenue has been generated in terms of email contact. Where this Email Marketing ROI Calculator can assist you to calculate the output values of ROI, Total Revenue Generated, Total Profit, Cost per Responder, Campaign Cost, Cost per Buyer, Number of Responders, and Number of Buyers.