Circulating Supply

What Is Circulating Supply?

Circulating supply is the number of cryptocurrency coins or tokens that are publicly available and actively trading in the market at any given time. It represents the portion of a token's total supply that holders can freely buy, sell, or transfer. Tokens held in team wallets, locked in vesting contracts, sitting in foundation treasuries, or permanently burned are excluded from this count.

The concept is analogous to "public float" in traditional equity markets: the number of shares available for public trading, excluding insider holdings and restricted stock. Just as a company's market cap is calculated from its float rather than total authorized shares, a cryptocurrency's market cap uses circulating supply rather than total or max supply. This gives investors a more accurate picture of how much value is actually accessible in the open market.

For Bitcoin, circulating supply is straightforward: approximately 20.04 million BTC have been mined out of the 21 million max supply, with roughly 450 new BTC entering circulation daily through mining rewards. For tokens with more complex distribution mechanisms, calculating circulating supply requires tracking vesting schedules, staking locks, treasury holdings, and burn events.

Circulating Supply vs. Total Supply vs. Max Supply

Three supply metrics define a cryptocurrency's tokenomics, and confusing them leads to misleading valuations:

Bitcoin is unusual in that its circulating supply and total supply are nearly identical because mined coins are immediately spendable. For most tokens, total supply exceeds circulating supply due to locked allocations. Some cryptocurrencies like Ethereum have no fixed max supply, making circulating supply even more important as a valuation metric.

How It Works

Circulating supply changes over time as tokens enter or leave the tradeable pool. The mechanisms that affect circulating supply fall into two categories: those that increase it and those that decrease it.

What Increases Circulating Supply

• Mining and staking rewards: new tokens minted as block rewards or validator incentives enter circulation immediately. Bitcoin's halving cuts this emission rate in half every 210,000 blocks.
• Vesting unlocks: tokens allocated to founders, team members, and early investors become tradeable when their vesting cliff or schedule completes.
• Escrow releases: programmed distributions from project treasuries. For example, Ripple releases up to 1 billion XRP monthly from escrow, returning unused portions.
• Unstaking: tokens removed from staking contracts return to the circulating pool and become tradeable again.

What Decreases Circulating Supply

• Token burns: permanent removal of tokens from circulation. Burned tokens are sent to an unspendable address, reducing both circulating and total supply forever.
• Staking locks: tokens deposited into staking contracts are removed from the tradeable supply. Ethereum validators, for instance, lock 32 ETH per validator.
• Vesting locks: newly created tokens subject to vesting schedules are excluded from circulating supply until their release date.
• Lost keys: tokens in wallets where the private key has been permanently lost are effectively removed from circulation. An estimated 3 to 4 million BTC are believed to be lost forever.
• Smart contract locks: tokens locked in DeFi protocols, liquidity pools, or governance contracts may be excluded depending on the data provider's methodology.

Calculating Market Capitalization

Circulating supply is one of two inputs in the most widely used valuation formula in crypto:

Market Cap = Current Price × Circulating Supply

Example:
  Price per BTC  = $105,000
  Circulating    = 20,040,000 BTC
  Market Cap     = $105,000 × 20,040,000 = ~$2.1 trillion

Fully Diluted Valuation (FDV) = Current Price × Max Supply
  FDV            = $105,000 × 21,000,000 = ~$2.2 trillion

The gap between market cap and FDV reveals how much potential dilution remains. A large gap suggests significant future token emissions that could put downward pressure on price. For Bitcoin, the gap is small (roughly 5%) because over 95% of its max supply is already in circulation. For newer tokens with aggressive vesting schedules, the FDV can be multiples of the market cap. Read more about how supply dynamics shape crypto markets.

How Data Providers Calculate Circulating Supply

No universal standard exists for what counts as "circulating." Major data aggregators use different methodologies, which can produce significantly different numbers for the same token.

CoinMarketCap

CoinMarketCap distinguishes between Circulating Supply (CS) and Unlocked Circulating Supply (UCS). CS includes all tokens not explicitly locked, while UCS further excludes tokens held by foundations or insiders even if technically unlocked. CoinMarketCap relies on self-reported data from project teams, supplemented by on-chain verification.

CoinGecko

CoinGecko defines circulating supply as tokens actively available and trading publicly, excluding locked or vested tokens and foundation holdings even if those holdings are technically unlocked. CoinGecko's inclusion of liquid staking derivatives in some calculations can create gaps compared to CoinMarketCap.

Why Discrepancies Matter

Different circulating supply numbers lead to different market caps, different rankings, and potentially different investment decisions. A token ranked #15 on one platform might be #20 on another purely because of methodology differences. Investors should compare data across multiple sources: aggregator sites, the project's official documentation, and on-chain block explorers that allow independent verification.

Use Cases

Valuation and Price Analysis

Circulating supply is the foundation of comparative valuation in crypto. When analysts say a token is "undervalued" or "overvalued," they typically compare its market cap (price times circulating supply) to peers with similar utility or network effects. Comparing price alone is meaningless without supply context: a token priced at $0.01 with 100 billion circulating supply has the same market cap as a token priced at $1,000 with 1 million supply.

Inflation and Dilution Assessment

Tracking how circulating supply changes over time reveals a token's real inflation rate. Even if a project has a fixed max supply, large upcoming unlocks from vesting schedules can flood the market with new tokens, diluting existing holders. Monitoring token unlock calendars helps investors anticipate supply-side pressure.

Stablecoin Supply Tracking

For stablecoins like USDC and USDT, circulating supply directly reflects market demand. When users mint new stablecoins by depositing fiat, circulating supply increases. When they redeem stablecoins for fiat, supply decreases. Tracking stablecoin circulating supply has become a key indicator of overall crypto market liquidity and capital flows.

DeFi Protocol Metrics

Total Value Locked (TVL) is often analyzed alongside circulating supply to assess a protocol's health. If a large percentage of a token's circulating supply is locked in DeFi protocols, the effective tradeable supply is even lower than the reported circulating figure, which can amplify price volatility in either direction.

Risks and Considerations

Supply Manipulation

Projects can manipulate perceived circulating supply by artificially locking tokens in opaque contracts or misreporting holdings to data aggregators. A lower reported circulating supply inflates the apparent market cap, making the project look more valuable than it is. Investors should verify supply data on-chain rather than relying solely on aggregator figures.

Cliff Unlock Events

Large vesting cliff unlocks can suddenly increase circulating supply by a significant percentage, creating sell pressure. These events are predictable but often overlooked. Token unlock tracking services monitor upcoming releases and estimate their market impact. A token with 20% of its supply unlocking in a single month faces very different dynamics than one with gradual linear vesting.

Lost Supply Uncertainty

There is no reliable way to distinguish between tokens that are permanently lost (keys destroyed) and tokens that are simply dormant (held long-term by a patient holder). Estimates of lost Bitcoin range from 3 to 4 million BTC, but this figure is inherently imprecise. The true circulating supply of any cryptocurrency is always somewhat uncertain because lost tokens cannot be definitively identified.

Cross-Chain Complexity

Tokens that exist on multiple chains through wrapped assets or bridges complicate supply accounting. The same token locked on one chain and minted on another should not be double-counted, but reconciling supply across chains introduces errors. Investors should understand whether a project's reported circulating supply accounts for cross-chain representations correctly.

This glossary entry is for informational purposes only and does not constitute financial or investment advice. Always do your own research before using any protocol or technology.