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About Market Capitalization Calculator Online
This tool computes market capitalization — the total dollar value of a company's outstanding shares. Enter the share price and the number of shares outstanding, and it returns the market cap.
Market cap is the standard measure of company size in the stock market. It is used to classify companies as small-cap (under $2 billion), mid-cap ($2–$10 billion), or large-cap (over $10 billion), and is the basis for inclusion in indexes like the S&P 500 (large-cap, U.S.) or the Russell 2000 (small-cap, U.S.).
Market cap differs from enterprise value, which adds debt and subtracts cash. For comparing companies with very different capital structures, enterprise value is often more meaningful — but market cap remains the headline figure most commonly cited.
How to use this tool
How to compute market capitalization
Enter share price
"Share price" is the current market price per share. Use the latest close or live quote depending on what "market cap" you want to report — intraday quotes drift constantly.
Shares outstanding
"Shares outstanding" is the company's total issued common shares — basic count, not weighted average. From the latest 10-Q / 10-K cover page or the equivalent in your market.
Press Run
Result is marketCap = price × sharesOutstanding. The output is raw, unrounded — your reporting layer can format it to nearest million / billion as needed.
Currency and shares unit
The tool doesn't enforce a unit on shares: if you enter price in dollars and shares in millions, market cap comes out in millions of dollars. Decide your unit before entering and stay consistent.