Multiply a stock's price by its shares outstanding to get market capitalization, see whether it is a mega-, large-, mid-, small-, micro- or nano-cap, and find the share price a company would need to reach a target market cap.
Last updated:
$
Use diluted shares for a fuller picture.
%
Share of stock freely tradable; for float-adjusted market cap.
Target market cap (optional)
$
Implied share price needed to reach it.
Enter your values to see the result.
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How to use the Market Cap Calculator
Enter the share price and the number of shares outstanding (diluted shares if you have them).
Choose the share unit: units, thousands, millions or billions, as shown in the company's report or on a quote page.
Add the public float (optional) to see the float-adjusted market cap used by many index providers.
Enter a target market cap (optional) to get the share price required to reach it.
Check the table for the price at each size threshold and market cap at other prices.
Example: 2.4 billion shares × $150 = $360 billion, a mega-cap. To reach $500 billion the price would need to be $500B ÷ 2.4B = $208.33, a 38.9% rise.
With a 92% public float, the float-adjusted market cap is $331.2 billion.
Market cap size classes
Class
Market cap range
Typical characteristics
Mega-cap
$200 billion and above
Global leaders, heavy index weights, high liquidity
Large-cap
$10 billion – $200 billion
Established companies, often dividend payers
Mid-cap
$2 billion – $10 billion
Growing companies with more room to expand
Small-cap
$300 million – $2 billion
Younger or niche businesses, more volatile
Micro-cap
$50 million – $300 million
Thinly traded, less analyst coverage
Nano-cap
Below $50 million
Very small, often over-the-counter, highest risk
These are common rule-of-thumb cut-offs; different index providers and brokers set their own, and they are reviewed periodically.
Tips
Use the right share count. Quote pages may show basic shares; the latest 10-Q or 10-K cover page lists shares outstanding, and the earnings report gives diluted shares.
Multiple share classes (for example class A and class C) must be added together, each at its own price.
Market cap changes every trade, so a figure is only a snapshot at the price you entered.
For valuation comparisons, combine market cap with revenue, earnings and debt using P/S, P/E or enterprise value.
Frequently asked questions
How do you calculate market cap?
Market capitalization = current share price × total shares outstanding. A company with 2.4 billion shares trading at $150 has a market cap of $360 billion. Use diluted shares (including options and convertibles) for a more conservative figure.
What are mega, large, mid, small and micro caps?
Common thresholds are: mega-cap $200 billion and above, large-cap $10–200 billion, mid-cap $2–10 billion, small-cap $300 million–$2 billion, micro-cap $50–300 million and nano-cap below $50 million. Index providers and brokers use slightly different cut-offs, and they shift over time as markets grow.
How do I find the share price needed for a target market cap?
Divide the target market cap by shares outstanding. For a company with 2.4 billion shares to reach $500 billion, the price would need to be $500B ÷ 2.4B ≈ $208.33. The calculator also shows the percentage rise required.
What is float-adjusted market cap?
Float-adjusted market cap counts only shares available for public trading, excluding shares held by insiders, governments or strategic holders. Major index providers weight companies by float-adjusted market cap, so it determines how much index funds buy.
Does a stock split change market cap?
No. A split increases the number of shares and lowers the price in the same proportion, so market cap stays the same. A 2-for-1 split of a $100 stock with 1 billion shares leaves 2 billion shares at $50, still $100 billion.
Is market cap the same as the value of a company?
Market cap is the market value of the common equity only. It ignores debt and cash. Enterprise value (market cap + debt + preferred + minority interest − cash) better reflects what it would cost to buy the whole business.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.