How market cap is calculated

Market capitalization is shares outstanding multiplied by the share price. For a made-up example: 50 million shares × a price of 4 = 200 million.

Market cap calculator

Market cap = shares outstanding × share price. We don't supply prices: type in a price you looked up yourself. Nothing you type is sent anywhere.

Shares outstanding

Share price you looked up (US dollars)

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Shares outstanding

Public U.S. companies report the number of shares outstanding on the cover of each 10-Q and 10-K they file with the SEC. That number changes when a company issues shares, buys them back, or does a split or reverse split, so always check the date it was reported.

Size bands

Band	Typical market cap range (US dollars)
Nano cap	Under 50 million
Micro cap	50 million to 300 million
Small cap	300 million to 2 billion
Mid cap	2 billion to 10 billion
Large cap	10 billion to 200 billion
Mega cap	200 billion and up

Size bands are common rules of thumb; definitions vary between index providers and brokers.

Market cap isn't the whole story

Float is the shares available to trade, which can be much smaller than shares outstanding.
Enterprise value adds debt and subtracts cash.
Smaller companies can be thinly traded and volatile.

Informational only. Not investment advice. EZMarketCap is a free reference built from public SEC filings. It doesn't recommend buying or selling any security and doesn't know your situation. No picks, ratings, prices or price targets. Check the company's own filings and talk to a registered adviser before you invest.