Use this market capitalization calculator to estimate a company’s equity market value from its share price and number of outstanding shares. Market cap shows what the stock market currently values those shares at—not the company’s revenue, cash balance, or underlying business value.
How to use the market cap calculator
- Enter the price of a single share. Use the market price for the date you want to analyze. The calculator displays prices in dollars.
- Enter the number of outstanding shares. Enter the full share count: for example, use 5000000 for 5 million shares, not 5.
- Read the Market Capitalization result. The calculator multiplies the two inputs and displays the total equity market value in dollars.
For a current estimate, use a recent stock quote and the latest reported outstanding share count. For a historical calculation, match the share price and share count to the same date as closely as possible. The result is only as current as the figures you enter.
Which share count should you use?
Use shares outstanding: shares held by investors, including restricted shares, but excluding treasury shares held by the company itself. You can usually find this figure in company filings or investor relations materials.
Do not substitute any of the following:
- Authorized shares: the maximum number the company is permitted to issue, including shares not yet issued.
- Public float: a narrower count of shares available for public trading.
- Weighted-average shares: a period-average figure used in earnings-per-share calculations, rather than a point-in-time count.
If a company has multiple share classes with different market prices, calculate each class’s value separately and add the results. This calculator performs one price-times-share-count calculation at a time.
Market capitalization formula and example
The market capitalization formula is:
Market capitalization = Price per share × Number of outstanding shares
The units are dollars per share multiplied by shares, leaving a result in dollars.
Using the calculator’s default values:
| Item | Value |
|---|---|
| Price of a single share | $45.93 |
| Outstanding shares | 5,000,000 |
| Market capitalization | $229,650,000 |
$45.93 × 5,000,000 = $229,650,000, or $229.65 million.
This means the outstanding shares are collectively valued at $229.65 million at the entered price. It does not mean the company has that much cash or would necessarily sell for that amount.
How to interpret and use market cap
Compare company size—not just share prices
A lower share price does not necessarily mean a smaller or cheaper company. A company with 100 million shares priced at $10 has a $1 billion market cap. Another with 1 million shares priced at $100 has a $100 million market cap, despite its higher stock price.
Investors use market capitalization to group companies into categories such as small-cap, mid-cap, and large-cap. The boundaries vary by data provider and index. Size can help describe an investment, but it does not determine risk: large companies can still experience substantial losses.
Test changes in price or share count
With shares outstanding held constant, market cap changes in direct proportion to the share price. In the worked example, a $1 increase per share adds $5 million to market cap.
Share issuance and buybacks can also change the outstanding share count, although market prices may change at the same time. A stock split alone does not create equity value: in a two-for-one split, twice as many shares at half the price produce the same market cap.
Recognize what market cap leaves out
Market cap does not account for debt and cash, measure profitability, or establish whether a stock is undervalued. It also is not a guaranteed takeover price: acquiring an entire company may involve a premium and other transaction costs.
For valuation decisions, consider market cap alongside earnings, cash flow, growth expectations, and financial obligations rather than treating size as a buy-or-sell signal.
Related valuation calculators
- Enterprise Value Calculator: move beyond equity market value to consider debt, cash, and other relevant financing claims.
- P/E Ratio Calculator: compare a company’s share price with its earnings per share to assess the price investors pay for earnings.
- EBITDA Multiple: explore a valuation approach based on operating earnings. An enterprise-value estimate must be adjusted for relevant debt, cash, and other claims before comparing it with market cap.
Discounted cash flow analysis offers another perspective by estimating value from expected future cash flows. Unlike market cap, it depends on forecasts and assumptions rather than only the entered market price and share count.
Build a calculator for your financial website
Financial publishers and advisory firms can use Calcopolis to build a customized valuation calculator for lead generation, helping visitors explore valuation scenarios and request a consultation with their assumptions already captured.