What Is Market Cap in Cryptocurrency?
Crypto market cap is the total value of a cryptocurrency's circulating supply, calculated by multiplying the current price by the number of coins currently in circulation. It is the most widely used measure of a cryptocurrency's relative size and is distinct from fully diluted valuation (FDV), which uses the total eventual supply rather than just circulating supply.
How Crypto Market Cap Is Calculated
Market cap = current price × circulating supply. If a token trades at $10 and has 100 million coins in circulation, its market cap is $1 billion. This figure makes it possible to compare differently-priced coins on equal footing: a coin priced at $0.001 with 1 trillion tokens in circulation has a $1 billion market cap — the same as the $10 coin — even though its per-unit price looks tiny. Comparing coins by price alone without market cap is a common mistake that leads investors to overvalue low-priced tokens.
Circulating supply is the number of coins that exist and are not subject to lock-up, vesting, or burning restrictions. It is different from total supply (all coins minted, including locked ones) and from max supply (the hard cap on tokens that will ever exist under the protocol's rules). Bitcoin's max supply is 21 million; its circulating supply is slightly lower because some coins have been permanently lost. Many newer tokens have complex vesting schedules — team allocations, investor tranches, ecosystem reserves — that will release additional supply over months or years, which is why circulating supply can diverge sharply from total supply.
Fully diluted valuation (FDV) accounts for this future supply by applying today's price to the token's maximum supply. If a token has a max supply of 1 billion but only 100 million are circulating today, its market cap at $10 per token is $1 billion but its FDV is $10 billion. A high FDV-to-market-cap ratio signals that significant dilution may occur as locked tokens unlock. Savvy investors compare both figures — a project with a modest market cap but enormous FDV may be far more expensive than it appears once all supply enters circulation.
Key Points
- Market cap = price × circulating supply. It is the standard measure of a crypto asset's total current value in the market.
- Fully diluted valuation (FDV) = price × max supply. It shows what the total value would be if every token were circulating today — a critical figure for evaluating future dilution risk.
- Bitcoin and Ethereum dominate "large-cap" crypto; mid-cap and small-cap projects carry significantly higher liquidity risk and volatility.
- Market cap ranks on sites like CoinMarketCap and CoinGecko use circulating supply by default — always check the FDV column alongside it before investing in a newer token.
Learn More
Market cap is just one layer of tokenomics analysis. See Market Cap vs. FDV for a complete breakdown of how to use both figures together when evaluating a cryptocurrency.
Related: Browse all questions
Related Questions
What is the difference between market cap and FDV? Market cap uses only the circulating supply — tokens currently in existence and not locked. Fully diluted valuation (FDV) uses the maximum total supply that will ever exist, including tokens not yet issued. FDV represents the theoretical total value if every token were in circulation at today's price. A very high FDV relative to market cap signals that large amounts of supply will unlock in the future, which can create selling pressure.
Is market cap a good indicator of a crypto's value? Market cap is a useful size comparison tool but a poor standalone value indicator. Two coins with the same market cap can have very different liquidity, token unlock schedules, and community activity. A high market cap coin is generally harder to manipulate and more liquid than a low-cap coin, but high market cap does not imply safety or fundamental value. Always evaluate market cap alongside FDV, trading volume, tokenomics, and on-chain activity.