Calculate market capitalization from share price and shares outstanding. Classify any company as micro, small, mid, large, or mega cap instantly.
Market capitalization — commonly called market cap — is the total market value of a company's outstanding shares. It is calculated by multiplying the current share price by the total number of shares outstanding. Market cap is the primary metric used to classify companies by size: micro cap, small cap, mid cap, large cap, and mega cap.
Our Market Cap Calculator takes a stock price and share count and instantly computes market cap along with its size classification. It also shows the implied share price for a target market cap and helps you understand where a company sits in the market landscape.
Understanding market cap is essential for portfolio construction, index investing, and comparing companies across different industries and markets. By classifying companies into micro-cap, small-cap, mid-cap, large-cap, and mega-cap tiers, you can build a diversified portfolio aligned with your risk tolerance and return objectives across different market cycles and conditions.
Stock price alone tells you nothing about company size. A $500 stock with 100 million shares is a $50B company, while a $10 stock with 5 billion shares is also $50B. Market cap cuts through price illusions and shows the true scale of a business. It also determines index eligibility and influences institutional buying decisions.
Market Cap = Share Price × Shares Outstanding. Enterprise Value = Market Cap + Total Debt − Cash and Equivalents.
Result: Market Cap: $2.85T (Mega Cap), Enterprise Value: $2.91T
At $185 per share with 15.4 billion shares outstanding, the company has a market cap of $2.85 trillion — firmly in mega cap territory. Adding $120B in debt and subtracting $62B in cash gives an enterprise value of $2.91 trillion, which represents the total cost to acquire the business.
Most investment portfolios are structured around market cap. Large cap stocks form the core for stability and dividends. Mid caps offer a balance of growth and stability. Small and micro caps add higher-risk, higher-reward exposure. Understanding where each holding falls on the market cap spectrum helps you build a balanced, diversified portfolio.
The rise of trillion-dollar companies — Apple, Microsoft, Amazon, Alphabet, Nvidia — has concentrated an unprecedented share of market value in a handful of stocks. As of 2025, the top 10 stocks by market cap account for roughly 35% of the S&P 500 total value. This concentration is important context for any investor holding index funds.
For serious valuation work, enterprise value (EV) is often more useful than market cap. EV-to-EBITDA, EV-to-Revenue, and EV-to-Free Cash Flow are standard metrics used by analysts and acquirers because they normalize for capital structure differences between companies.
Common classifications: Mega cap ($200B+), Large cap ($10-200B), Mid cap ($2-10B), Small cap ($300M-2B), Micro cap ($50-300M), and Nano cap (below $50M). Exact cutoffs vary by source, but these ranges are widely used.
Market cap is the equity value — what stockholders own. Enterprise value (EV) adds debt and subtracts cash, representing the total cost to acquire the entire business. EV is more useful for comparing companies with different capital structures.
Market cap represents what the market currently values the equity at — it is a real-time opinion, not an intrinsic value. The actual worth of a company depends on its earnings, assets, growth prospects, and competitive position.
Absolutely. A $50B tech company with no debt and $20B in cash is very different from a $50B utility with $30B in debt. Market cap alone does not capture financial health, profitability, or risk profile.
Because they have an enormous number of shares outstanding. A company with 50 billion shares at $5 each has a $250B market cap. Stock price alone is meaningless without knowing the share count.
It does not. A 2-for-1 split doubles the shares and halves the price, leaving market cap unchanged. Stock splits are cosmetic changes to per-share numbers and do not alter the company overall value.