Market share is the portion or percentage of sales of a particular product or service in a given region that are controlled by a company. If, for example, there are 100 widgets sold in a country and company A sells 43 of them, then company A has a 43% marketmarketmarket shareshareshare. You can also calculate marketmarketmarket shareshareshare using revenue instead of units sold. If company A sold widgets for a total cost of $860 and the people in the country spend a total of $2,000 on the same widgets, then the marketmarketmarket shareshareshare is $860/$2,000 or 43%. The two different methods of calculating marketmarketmarket shareshareshare won't always provide the same answer, because different companies may charge slightly