Market Share Calculator
Calculates your company's percentage of total industry revenue relative to the overall market. Use it during competitive analysis, investor presentations, or strategic planning to quantify your competitive position.
About this calculator
Market share measures how much of an industry's total revenue belongs to a single company. The formula is: Market Share (%) = (companyRevenue / totalMarketSize) × 100. For instance, if your company earns $5 million and the total market is worth $100 million, your market share is 5%. This metric is widely used by investors, analysts, and executives to assess competitive strength and growth potential. A growing market share implies you are capturing business faster than rivals, while a declining share — even alongside rising revenue — signals competitors are outpacing you. Market share can also be calculated using units sold instead of revenue, which is useful when comparing across price tiers.
How to use
Suppose your software company generated $8,000,000 in annual revenue and industry analysts estimate the total addressable market at $200,000,000. Enter 8000000 as Company Revenue and 200000000 as Total Market Size. The calculator computes: (8,000,000 / 200,000,000) × 100 = 4.0%. Your current market share is 4%. If a competitor just reported $16,000,000 in revenue from the same market, their 8% share immediately shows the gap you need to close.
Frequently asked questions
What is the difference between market share and market size?
Market size refers to the total revenue or unit volume generated by all participants in an industry — it's the denominator. Market share is your slice of that total, expressed as a percentage. A large market size is attractive because even a small share can represent significant revenue; however, market share is the metric that reveals your competitive standing relative to other players.
How do companies use market share data in strategic planning?
Executives use market share trends to set growth targets, justify R&D investment, and evaluate the success of pricing or marketing strategies. A company losing share despite revenue growth may choose to adjust pricing or accelerate product development to stay competitive. Investors also scrutinize market share when assessing a company's 'moat' — its ability to defend its position against new entrants or substitutes.
Why can market share calculations be misleading without context?
Market share figures depend entirely on how you define the market. A narrow market definition inflates your share, while a broad definition deflates it. For example, a regional brewery may hold 30% of craft beer sales in one city but less than 0.1% of the global beer market. Always state the market scope clearly when reporting share figures, and compare trends over time rather than relying on a single snapshot.