Market Cap Calculator
Calculate market capitalization and classification.
Understanding Market Capitalization
What is Market Cap?
Market capitalization (market cap) is the total value of a company's outstanding shares. It is calculated by multiplying the current stock price by the total number of outstanding shares. Market cap is the primary way investors categorize companies by size.
Formula
Market Cap = Stock Price × Shares Outstanding
Market Cap Classifications
| Classification | Range | Risk Level |
|---|---|---|
| Mega Cap | $200B+ | Mega Cap |
| Large Cap | $10B - $200B | Large Cap |
| Mid Cap | $2B - $10B | Mid Cap |
| Small Cap | $300M - $2B | Small Cap |
| Micro Cap | $50M - $300M | Micro Cap |
| Nano Cap | < $50M | Nano Cap |
Why Does Market Cap Matter?
Market cap helps classify the risk profile of an investment. Smaller caps tend to be more volatile but offer higher growth potential.
Frequently Asked Questions
What is market capitalization?
Market capitalization is the total market value of a company's outstanding shares, calculated as share price × total shares outstanding.
What is a good market cap?
There is no "good" market cap. Larger caps are generally safer while smaller caps offer more growth potential but with higher risk.
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What is this tool?
Market capitalization calculator determines the total value of a company's outstanding shares. Market Cap = Current Share Price × Total Outstanding Shares. It classifies companies into mega-cap (>$200B), large-cap ($10-200B), mid-cap ($2-10B), small-cap ($300M-2B), micro-cap ($50M-300M), and nano-cap (<$50M) categories.
How to use
- 1
Enter share price
Input the current trading price per share.
- 2
Enter total shares
Input the total number of outstanding shares.
- 3
View market cap
See market cap value and company size classification.
Frequently Asked Questions
Why is market cap important for investors?
Market cap indicates a company's size and helps assess risk. Larger companies tend to be more stable with lower volatility, while smaller companies offer more growth potential but carry higher risk. It also determines fund eligibility and index inclusion.
What is the difference between market cap and enterprise value?
Market cap only counts equity value. Enterprise Value (EV) = Market Cap + Debt - Cash. EV gives a more complete picture of company value by accounting for debt obligations and cash reserves.
How does market cap affect stock volatility?
Larger companies (mega-cap, large-cap) tend to be less volatile because they have more resources, diversified revenue streams, and established market positions. Small-cap and micro-cap stocks can be much more volatile — they may double or halve in value more easily. However, smaller companies also offer greater growth potential. Many portfolios balance large-cap stability with small-cap growth opportunities.
How is market capitalization calculated?
Market capitalization = Current Share Price × Total Outstanding Shares. Example: 8 billion shares at $150 per share = $1.2 trillion. The calculator then classifies the result into size tiers: mega-cap ($200B+), large-cap ($10-200B), mid-cap ($2-10B), small-cap ($300M-2B), micro-cap ($50M-300M), and nano-cap (under $50M).
What is market capitalization?
Market capitalization is the total value the market puts on a company — what buying every outstanding share at today's price would cost. It is the standard yardstick of company size, because share price alone is misleading: two companies trading at $50 per share can have market caps that differ by hundreds of times depending on how many shares exist.
Why do two companies with the same share price have different market caps?
Market cap = share price × shares outstanding. A $100 stock of a company with 10 million shares has a $1 billion market cap, while the same price on a company with 1 billion shares gives a $100 billion market cap. The total number of shares is what makes the difference.
Which share count should I use when calculating market cap?
Use total shares outstanding (basic shares), not diluted. Most quote sites show both; diluted shares add in options and convertible securities and give a higher, more conservative figure that analysts sometimes prefer for valuation.
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