More specifically, market share usually refers to revenue market share. As with standard market share, you can calculate your relative market share of different metrics, for different time ranges, and for different segments. The standard market share formula is:Market share percentage = (company revenue / market revenue) x 100Let’s say the U.S. smartphone industry generated $80 billion of revenue last year. And this is the relative market share formula:Relative market share percentage = (company market share / strongest competitor’s market share) x 100Let’s say Apple is the market leader with a 25% market share. Apply the Market Share FormulaAll that’s left is to use your data in the market share formula for your chosen metric.