Equity investing

Market Capitalization Calculator

Multiply the share price by the number of shares outstanding to find market capitalization, the total market value of a company's equity.

  • Free
  • No sign-up
  • Updated for 2026

Price & shares

$
shares

Enter the share price and shares to see market cap.

Worked example

With these example inputs:

  • Share price$50
  • Shares outstanding100000000 shares

Market capitalization: $5,000,000,000

  • Share price$50
  • Shares outstanding100,000,000

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What market capitalization is

Market capitalization is the total value of a company's shares. It is the price of one share times the count. You enter the share price. You also enter the shares outstanding. The tool multiplies the two. The result sits in your currency. One multiplication gives the answer.

Why market cap matters

Market cap shows a company's size at a glance. It is how the market values the whole firm. It groups firms into small, mid and large. It also shapes which funds can buy in. The market capitalization is the headline figure. It sizes the firm in one number. Bigger firms carry a larger cap.

How to use this calculator

Enter two values. Put in the share price in your currency. Then enter the shares outstanding. The tool multiplies them at once. You read the market capitalization at the top. Change either figure and it updates.

How it is calculated

The math is one step. Market cap = share price × shares outstanding. You take the price and apply the count. The answer is the total equity value. It sits in your currency. Price times count is the whole idea. The result is the total equity value.

A worked example

Say the share price is fifty. The shares outstanding are one hundred million. Multiply fifty by one hundred million. The market cap is five billion. That is the whole company's market value. Fifty across a hundred million shares.

Reading the result

The total is the market capitalization. It is the value of all shares. It is not the company's cash or debt. Compare it across firms to gauge size. Use it as one measure, not the only one. It leaves out cash and debt.

Market cap and company size

Market cap sorts firms by scale. Large caps are big, settled names. Small caps are smaller and often riskier. The label shifts as the price moves. Watch it to track a firm's standing. A rising price lifts the cap.

Common mistakes to avoid

One slip is using the wrong share count. Another is mixing price with book value. People also forget shares can change. Each error skews the cap. Use the latest figures for both. Stale counts give a wrong cap.

The limits of this tool

This calculator gives a single snapshot. It does not value debt or cash. It ignores future growth or risk. It also moves with every price tick. Use it as a quick gauge. It shifts with every trade.

Using market cap to compare

Line up firms by their cap. It puts them on one scale. Pair it with sales or profit. A big cap is not always a bargain. Let the full picture guide you.

A final tip

Recompute the cap as the price moves. A new price changes it at once. Compare a few firms to plan. A clear figure keeps your view grounded. Recompute it whenever the price moves.

Frequently asked questions

What is market capitalization?

Market cap is the total value of a company's shares, the share price multiplied by the number of shares outstanding. It is a quick gauge of company size.

How do market cap categories work?

Companies are loosely grouped as small-, mid- and large-cap by their market value. The thresholds vary, but large-cap usually means tens of billions and up.