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What Market Cap Means in Crypto, and What It Does Not

4 min read · updated 14 November 2026

Market cap is price times circulating supply. Learn how it is calculated, how it differs from fully diluted value and why a low price does not mean a coin is cheap.

Market capitalisation, usually shortened to market cap, is the most common way to compare the size of cryptocurrencies. It is also one of the most misunderstood numbers in crypto.

How it is calculated

Market cap is the current price of one coin multiplied by the number of coins in circulation. If a coin trades at $2 and 500 million coins are in circulation, its market cap is $1 billion.

The cryptocurrency price list on this site ranks coins by market cap, using prices and supply figures from CoinGecko.

Price alone tells you very little

A coin priced at $0.001 is not automatically cheap, and a coin priced at $50,000 is not automatically expensive. What matters is how many coins exist. A tiny price multiplied by trillions of coins can produce a market cap larger than a coin with a high price and a small supply.

Circulating supply versus fully diluted value

Many projects have coins that exist but are not yet tradable, for example tokens held by the team or released over several years. Fully diluted valuation (FDV) multiplies the price by the maximum or total supply instead of the circulating supply. A large gap between market cap and FDV means many new coins may reach the market later, which can weigh on the price.

Total crypto market cap

Add up the market caps of all coins and you get the total crypto market cap shown at the top of the dashboard. It is a quick way to see whether the market as a whole is growing or shrinking. Bitcoin dominance is Bitcoin's share of that total.

Limits to keep in mind

  • Market cap is not the amount of money invested. It is a price multiplied by a supply. Selling even a small share of coins could move the price a lot if trading is thin.
  • Supply figures come from the projects and data providers. They can be wrong or out of date.
  • Stablecoins have large market caps, but they track the dollar and do not reflect growth in the same way.

For trading activity, look at 24 hour volume next to market cap. Coins with very high volume compared with their market cap appear in the unusual volume list on the gainers and losers page.

This guide is general information, not financial advice.