Market Capitalization Calculator
Company value from share price and shares outstanding
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Need a fast answer on company value from share price and shares outstanding? Market Capitalization Calculator answers with the steps beside it. Enter Share Price ($) and Shares Outstanding in any order — Market Capitalization recalculates on every edit. The answer from Market Capitalization arrives with its working attached. Market Capitalization replaces guesswork. Market Capitalization is privacy-first: Finance inputs stay offline. Market Capitalization sits in the Finance section next to free online market capitalization calculator and market cap calculator market capitalization share price shares. Run Market Capitalization twice to find the driving input. No sign-up or email — Market Capitalization answers as you type.
What the defaults give
$150 a share across 1,000,000,000 shares is $150.00 billion.
That puts the company firmly in large-cap territory, which generally starts at $10 billion.
The formula
Market cap = share price × shares outstanding
150 × 1,000,000,000 = 150,000,000,000 → $150.00B.
Worked examples
$150 × 1B shares → $150.00B
$25 × 400M shares → $10.00B
$8 × 50M shares → $400.00M
$1,200 × 15B shares → $18.00T
The size bands
Roughly: large cap above $10 billion, mid cap $2–10 billion, small cap under $2 billion, with micro cap below about $300 million. The bands matter because index funds, institutional mandates and liquidity all key off them — a company crossing $10 billion enters a different pool of buyers.
What market cap does not tell you
- Debt. Market cap is equity value only. A company with heavy borrowings costs more to buy than its market cap suggests; enterprise value is the number for that.
- Free float. Shares outstanding include those held by founders and governments that never trade, so the investable value can be much smaller.
- Valuation. A high market cap says nothing about whether the price is justified — that needs earnings, cash flow or revenue to compare against.
- Class structures. Where there are multiple share classes, the simple count can misstate control as well as value.
Use market cap to size a company, not to value it. For the second question, divide it by earnings or revenue and compare the multiple with peers.
Market capitalisation is a price, not a valuation of the business: $150 a share times a billion shares is $150 billion, and it moves whenever the share price does. It ignores debt and cash, which is why enterprise value exists for comparing companies with different capital structures. The size bands — large above $10 billion, mid $2 to 10 billion, small below $2 billion — describe liquidity and analyst coverage more than quality. A buyback shrinks the share count and raises the price of each remaining share, leaving market cap roughly unchanged.
Frequently Asked Questions
What is the market cap of a $150 stock with a billion shares?
$150 billion. Price multiplied by shares outstanding gives the total equity value.
What counts as large cap?
Commonly above $10 billion. Mid cap runs about $2–10 billion and small cap below $2 billion.
Is market cap the same as company value?
No. It is the value of the equity only. Add debt and subtract cash to get enterprise value, which is what an acquirer would pay.
Why do shares outstanding change?
Buybacks reduce them, issuance and stock compensation increase them. Both change the market cap without the share price moving.
What is free float?
The shares actually available to trade, excluding founders, governments and locked-up holders. A low float makes a stock harder to buy or sell in size.
Does a big market cap mean a good investment?
No. Size describes the company, not the price. A large cap can be expensive or cheap depending on what you pay for its earnings.
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