Market Capitalization Calculator (Market Cap)

Market capitalization is the total market value of all outstanding shares of a public company. The formula: market cap = share price × shares outstanding. Example: a share price of US$50 times 10 million shares outstanding = a US$500 million market cap. This figure changes every time the share price moves in the market.

Market cap only measures the market value of all outstanding shares, i.e. the claim of shareholders. Enterprise value (EV) measures the value of the entire company to all capital providers with the formula EV = market cap + total debt − cash and cash equivalents. Scope note: this calculator computes market cap from share price × shares outstanding; to compute enterprise value from its components, use the Enterprise Value Calculator at https://nrtechstudio.com/tools/enterprise-value/.

Commonly used categories: mega-cap (around US$200 billion and above), large-cap (around US$10–200 billion), mid-cap (around US$2–10 billion), small-cap (around US$300 million–2 billion), and micro-cap (below around US$300 million). These are descriptive labels for grouping company size, not official benchmarks: each source uses different thresholds, and this calculator shows them only as context.

Basic market cap uses current shares outstanding. Fully diluted market cap adds all potentially convertible securities: stock options, RSUs, and convertible securities. Example: US$50 × 10 million shares = US$500 million (basic); adding 2 million options gives US$50 × 12 million = US$600 million (fully diluted), with 20% potential dilution. The fully diluted figure shows the value if all conversion rights were exercised.

Market cap is the current equity market value based on traded share prices. Company valuation is an estimate of fair value under some method, such as discounted cash flow (DCF) or comparable multiples. Market cap can sit above or below a valuation result, and the difference is not a buy or sell signal. This calculator computes a market figure, not a valuation, and its results are not investment advice.

Treasury shares are company shares bought back (buyback) and held as company cash, not in circulation. Treasury shares are not counted as shares outstanding, so they do not enter market cap. When a company does a buyback, the number of shares outstanding falls; at the same price, market cap falls too.

Yes, because market cap also depends on the number of shares outstanding. In a stock split, the share count rises and the per-share price falls proportionally so market cap is unchanged. Conversely, issuing new shares raises market cap at the same price, while a buyback lowers it. That is why changes in share count must be accounted for, not just the price.