Look up almost any token on a block explorer or a market dashboard and you will see more than a price. Underneath it sits a market cap, and often a second, larger figure labeled fully diluted valuation, or FDV. Both are usually higher than most people expect, and the gap between them can be confusing if nobody has explained what each one is actually measuring. Here is what those numbers mean, how they are calculated, and why relying on price alone to judge a token can lead you astray.
Why price by itself does not tell you much
It is tempting to compare two tokens by their price per unit. Token A costs $0.002 and token B costs $40, so token B must be worth more, right? Not necessarily. Price per token is an arbitrary number that depends entirely on how many units the project decided to create. A project can launch with a trillion tokens priced at a fraction of a cent, or a hundred thousand tokens priced at hundreds of dollars, and end up representing the exact same total value either way. Our guide on token decimals covers a related idea: the number displayed in your wallet is shaped by a design choice, not a fixed law. Price works the same way. To compare tokens meaningfully, you need to multiply price by supply, which is exactly what market cap and FDV do.
What market cap actually measures
Market cap is short for market capitalization, and the formula is simple: circulating supply multiplied by current price. Circulating supply means the tokens that actually exist right now and are free to move, the ones that could be bought or sold at this moment. It deliberately excludes tokens that have not been created yet, and it usually excludes tokens that exist but are locked, such as a team's allocation still under a vesting schedule.
Market cap is a useful shorthand for size. A token with a $2 million market cap and a token with a $2 billion market cap occupy very different places in the ecosystem, even if their per-token price happens to look similar on a screen. But market cap is still just a multiplication, not a measure of how much real money has been invested or how much cash sits behind the project, a distinction worth keeping in mind before treating a large number as reassurance on its own.
What fully diluted valuation adds
Fully diluted valuation asks a different question: what would the market cap be if every token that will ever exist were already circulating and trading at today's price? The formula is the same multiplication, but with maximum total supply in place of circulating supply.
The gap between market cap and FDV tells you how much of a token's eventual supply is still on the way. A token with a market cap of $10 million and an FDV of $12 million has most of its supply already circulating. A token with a market cap of $10 million and an FDV of $300 million has the vast majority of its supply still locked up, scheduled to unlock over months or years through mechanisms like team vesting, investor unlocks, or ongoing emissions to stakers and liquidity providers.
That gap is not, by itself, good or bad. Vesting schedules for a team and early backers are standard practice and are usually disclosed in a project's documentation. But a wide gap is a structural fact worth knowing regardless of what a token's price happens to be doing: new supply entering circulation over time is a mechanical certainty built into the token's design, not a prediction about the future. It is the kind of detail that belongs in your research alongside everything else, not a red flag on its own and not something to ignore either.
Where these numbers come from, and why to double check them
Block explorers and aggregator dashboards calculate market cap and FDV from supply figures that are usually pulled from the token contract itself or reported by the project. For established tokens this is reliable. For very new or low-liquidity tokens, it is worth a second look. A supply figure can be wrong, outdated, or in rarer cases deliberately misleading, and a market cap built on a wrong number is a wrong market cap. If a token's legitimacy is already in question, the same habit covered in our guide on finding a contract address you can trust applies here too: check the contract directly on a block explorer rather than taking a dashboard figure at face value.
The bigger limitation: thin liquidity
Even a correctly calculated market cap can be misleading if the token trades in a shallow pool. Market cap multiplies the full circulating supply by the current price, but that price might only reflect what happened with the last small trade against a pool holding very little liquidity. Our articles on liquidity pools and price impact and slippage cover why a thin pool means the price you see can move sharply on modest trade sizes. A large market cap sitting on top of a shallow pool is not the same thing as a large amount of money that could actually be exchanged at that price.
Using these numbers well
Market cap and FDV are useful for comparing the relative size of projects and for understanding how much of a token's supply is still to come. They are not a safety signal, a guarantee of legitimacy, or a measure of how much liquidity is actually available. Treat them as one input among several, alongside checking the contract address, looking at how deep the liquidity actually is, and applying the same habits covered in our guide on spotting scam tokens. None of these checks take the place of your own judgment, but together they give you a far more complete picture than a single price on a screen ever could.