Market Share Growth Calculator
Calculate current and historical market share, measure the gain in percentage points, and forecast how company growth versus market growth changes your competitive position.
View all free toolsInputs
Total market revenue in the comparison period.
Revenue from the same market and period.
Choose 1 to 15 years.
Current market share
7.50%
Company revenue as a percentage of the defined market.
Previous share
6.67%
Share in the comparison period.
Share change
+0.83 pts
12.5% relative change.
Projected share in 3 years
10.29%
$129.6M projected company revenue.
Projected market size
$1.3B
8.0% annual market growth.
Market share projection
Compare your share trajectory or the final-year market split.
How to calculate market share growth
Market share separates growth driven by the market from growth won from competitors. Use a consistent denominator and report both the percentage-point change and the relative rate so readers cannot confuse the two.
Market share = Company revenue ÷ Total market revenue × 100
Share change (points) = Current share − Previous share
Projected share = [Company revenue × (1 + company growth)^years] ÷ [Market size × (1 + market growth)^years]
Keep the denominator consistent
A credible calculation compares like with like: the same product category, customer segment, geography, currency, and time period. Revenue share and unit share answer different questions, so label the basis clearly and never mix them in one calculation.
Market outperformance
Company growth above market growth generally expands share.
Market underperformance
Revenue can grow while share contracts if the market grows faster.
Quality of share
Check gross margin, retention, and acquisition spend before calling a gain healthy.
Alex Tapio
Founder of Finamodel • Professional Financial Modeller • Ex-Deloitte
Frequently asked
Divide company revenue (or units sold) by total market revenue (or units sold) for the same geography, segment, currency, and period, then multiply by 100. Do not mix revenue-based company data with a unit-based market estimate.
Market share growth is the change in a company’s share of its addressable market. It is clearest in percentage points: a move from 6% to 8% is a 2-point gain. Relative growth for the same move is 33.3%.
Yes. If the overall market grows faster than the company, company revenue can rise while its share falls. That is why this calculator models company and market growth separately.
Use the market definition that matches the revenue being measured. SAM is often the most practical denominator because it reflects the customers and geography the company can currently serve. TAM can understate meaningful share in a focused segment.
There is no universal benchmark. A gain is meaningful when it persists, is profitable, and does not rely on unsustainable discounting. Compare percentage-point gains with direct competitors and the growth rate of the underlying market.
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