How the 21mill price works
A unit price is a small number when a huge number of units exist. The 21mill price restates every coin as if its circulating supply equaled Bitcoin's, so a $0.10 coin and an $80,000 coin can be read on the same scale.
The formula
21mill price = (spot price × circulating supply) ÷ Bitcoin's circulating supply
The numerator is the coin's market cap. Dividing by Bitcoin's supply asks what one coin would cost if only as many existed as Bitcoin. The same figure is the spot price times the supply multiple:
21mill price = spot price × (coin supply ÷ Bitcoin supply)
A $0.10 coin
Suppose a coin trades at $0.10 and 160 billion of them are in circulation. Bitcoin's circulating supply, in this example, is 20 million. That is 8,000× as many coins.
21mill price = $0.10 × 8,000 = $800
The market cap is $16 billion either way. The exchange price looks small because the unit is small.
A $10,000 target
If that coin's spot price reached $10,000, the circulating supply would be worth $1.6 quadrillion. That is 100,000× today's market cap. Set beside a $2 trillion Bitcoin, it is 800× Bitcoin's entire market. The calculator on each row and coin page does this with live supplies. The presets include $1, $10, and $10,000.
Max supply
The table uses circulating supply. Some coins have a much larger max supply still to be issued. On the coin page, when CoinGecko reports a max supply, a second 21mill price uses the fully diluted valuation: the max supply valued at today's spot price, divided by the same Bitcoin denominator. A low-float coin can look inexpensive on circulating supply alone.
Which Bitcoin supply
The default denominator is Bitcoin's live circulating supply, so Bitcoin's own 21mill price equals its spot price. The header can switch the denominator to exactly 21,000,000. Bitcoin then prices under the spot price, because fewer than 21 million bitcoin exist today. The supply multiple always compares against the live circulating supply.
Data
Prices, supplies, and market caps come from CoinGecko and refresh about every five minutes. The list is the top 250 coins by market cap. Coins without a reported circulating supply stay in the table and do not receive a 21mill price. The market-cap column shows CoinGecko's reported figure. The 21mill price uses spot price times circulating supply, which keeps Bitcoin's row aligned with the price on exchanges.
These figures restate public market data. They are not a forecast, a recommendation, or an offer to buy or sell any asset.