Circulating, total, and max supply
Circulating supply is how many coins are available and trading now. Total supply includes coins that exist but are locked or reserved. Max supply is the most that will ever exist, if there is a cap. The differences matter because circulating supply drives market cap, and coins waiting to enter circulation can add selling pressure later through unlocks or ongoing issuance.
Crypto throws three similar-sounding supply numbers at you, circulating, total, and max, and they are easy to blur together. But the differences between them matter, because they shape a coin's market cap, hint at future selling pressure, and tell you whether a coin is scarce or steadily inflating. Here is what each means and why you should care.
The three supply numbers
Circulating supply is the number of coins available and trading in the market right now. These are the coins in people's hands and on exchanges, the ones that real buying and selling moves. This is the figure used to calculate market cap, because it reflects what is in play.
Total supply is all the coins that currently exist, including ones that are not circulating, locked up, reserved by the project, or otherwise held back from the market. Max supply is the hard ceiling, the most coins that will ever exist, for coins that have one. Bitcoin's max supply is famously 21 million. Some coins, by contrast, have no max supply at all and keep issuing new coins indefinitely.
Why the difference matters
The gap between circulating and total supply is where future pressure hides. If a coin has a large amount of supply that exists but is not yet circulating, those coins can enter the market later, through scheduled unlocks, team and investor allocations vesting, or ongoing issuance, and more supply hitting the market can weigh on the price if demand does not keep up. A coin where most of the supply is already circulating has less of this overhang than one where a big chunk is still waiting to be released.
This is why people watch token unlock schedules and pay attention to whether a coin is inflationary, steadily issuing new supply, or capped. A capped coin like Bitcoin gets scarcer over time relative to demand, while an uncapped coin has to generate enough demand to absorb its constant new supply just to hold its price. Neither is automatically better, but they are very different dynamics worth understanding.
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When sizing up a coin, check how its circulating supply compares to its total and max. A coin with most of its supply already circulating has fewer surprises coming from unlocks. A coin with a large gap has more potential future supply to absorb. And whether it has a max supply at all tells you if it is designed for scarcity or for ongoing issuance, which shapes its long-term supply story.
This connects directly to market cap, since circulating supply is what the calculation uses, covered in our market cap guide. For an example of a capped coin, see what is Bitcoin and its 21 million limit, and for an uncapped one, the supply note in what is Dogecoin.