ROI or Return on Investment calculates the percentage gained or lost on an investment. In simple terms it tells you if you made a profit or had loss on certain investment. This ROI calculator is created keeping in mind the specific needs of an online advertiser/retailer who wants to keep full control on his/her advertising spend and returns. Online advertising campaign's profitability and the decision to continue to run any campaign is based on this very critical parameter. You just need to fill in the value of Revenue and Cost and the ROI in both formats, i.e. RoAS and ROI will be calculated.