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Market capitalisation calculator

Market capitalisation (market cap) is the total dollar value of a company's outstanding shares — the market's price tag for the whole business.

Updated July 2026
$
Market cap
$100B
$100,000,000,000
Classification
Large-cap

How it works

Market Cap = Share Price × Shares Outstanding
  • Enter share price and total shares outstanding.
  • The calculator returns market cap in dollars and its size classification.

Worked examples

  • $100 share × 1B shares = $100B market cap (large-cap).
  • $5 share × 40M shares = $200M market cap (small-cap).

Frequently asked questions

How are cap sizes defined?

Rough US definitions: mega ≥$200B, large ≥$10B, mid $2–10B, small $300M–$2B, micro under $300M.

Is market cap the same as enterprise value?

No. Enterprise value adds debt and subtracts cash, giving the total acquisition price of the business.

Related

Market cap (glossary)
Reference definition.
Educational information only. Not personalised financial advice. Consult a qualified professional for decisions specific to your situation.