Market Capitalization Calculator
Calculate the total market value of a publicly traded company by multiplying share price by outstanding shares. Get company size classification (large, mid, small cap) and charts.
About This Calculator
The Market Capitalization Calculator helps investors determine the total market value of a publicly traded company by multiplying its current share price by the total number of outstanding shares. This simple yet powerful metric is widely used by investors worldwide to classify companies by size, assess investment risk, and build diversified portfolios. Whether you are analyzing stocks on the NYSE, NSE India, or London Stock Exchange, understanding market cap helps you make informed investment decisions.
The formula is straightforward: Market Capitalization = Current Share Price × Total Outstanding Shares. For example, if a company has 10 million shares trading at $100 each, its market capitalization is $1 billion. This calculator also classifies the company as Large Cap ($10B+), Mid Cap ($2B-$10B), or Small Cap (under $2B) based on standard market conventions for the US market. Note that classification thresholds differ by market — SEBI in India and FTSE in the UK use different benchmarks based on market rankings and capitalization ranges.
Regional Notes
India (NSE/BSE): SEBI classifies companies by ranking — top 100 by market cap are large cap, 101st-250th are mid cap, and 251st onwards are small cap. As of 2025, approximate thresholds are INR 20,000 crore+ for large cap, INR 5,000-20,000 crore for mid cap, and below INR 5,000 crore for small cap.
United States (NYSE/NASDAQ): Standard classification is $10 billion+ for large cap, $2 billion to $10 billion for mid cap, and under $2 billion for small cap. The S&P 500 index consists primarily of large cap US companies.
United Kingdom (LSE): The FTSE UK Index Series classifies companies as large cap (FTSE 100, roughly £4B+), mid cap (FTSE 250, roughly £200M-£4B), and small cap (FTSE SmallCap, under £200M).
Frequently Asked Questions
What is market capitalization?
Market capitalization is the total value of a company's outstanding shares, calculated by multiplying the current share price by the total number of outstanding shares. It represents the market's estimate of a company's total value. Investors use market cap to classify companies as large cap, mid cap, or small cap for portfolio diversification.
How do you calculate market capitalization?
Market capitalization is calculated by multiplying the current share price by the total number of outstanding shares. For example, if a company has 10 million shares trading at $100 each, its market cap is $1 billion. The formula is: Market Cap = Share Price x Number of Outstanding Shares.
What is the difference between large cap, mid cap, and small cap stocks in the US?
In the US market, large cap companies have a market capitalization of $10 billion or more and are typically stable, well-established firms. Mid cap companies range from $2 billion to $10 billion and offer growth potential with moderate risk. Small cap companies are under $2 billion and carry higher risk but potential for higher returns. These thresholds may differ in India and UK markets.
What are large cap, mid cap, and small cap classifications in India?
In India, SEBI defines large cap companies as the top 100 companies by market capitalization, mid cap as the 101st to 250th ranked companies, and small cap as the 251st and below. As of 2025, the threshold for large cap in India is roughly around INR 20,000 crore or more, mid cap between INR 5,000-20,000 crore, and small cap below INR 5,000 crore.
What are the FTSE UK market cap classifications?
In the UK market, FTSE classifies companies as large cap (FTSE 100, approximately £4 billion+ market cap), mid cap (FTSE 250, approximately £200 million to £4 billion), and small cap (FTSE SmallCap, under £200 million). The FTSE 100 represents the 100 largest companies listed on the London Stock Exchange.
Is a high market capitalization good or bad?
A high market capitalization generally indicates a larger, more established company that is less risky than smaller companies. However, large cap stocks may offer lower growth potential compared to mid or small cap stocks. Market cap alone does not indicate whether a stock is overvalued or undervalued — investors should also examine fundamentals like P/E ratio, revenue growth, and debt levels.
What is the difference between market capitalization and enterprise value?
Market capitalization only accounts for the total value of outstanding shares (equity value), while enterprise value includes market cap plus debt, minority interest, and preferred shares, minus cash and cash equivalents. Enterprise value provides a more complete picture of a company's total value, especially for acquisition purposes.
What is fully diluted market capitalization?
Fully diluted market capitalization includes all possible shares that could be outstanding, such as stock options, convertible bonds, warrants, and preferred stock in addition to current outstanding shares. This gives a more conservative view of market cap by accounting for potential future dilution from employee stock plans and convertible securities.