Crypto market cap calculator
Work out a coin's market cap from its price and circulating supply, or the price a target market cap would mean. Live figures fill in for major coins.
How it's calculated
Market cap = price per coin × circulating supply
Rearranged, the price a coin would have at a given market cap is market cap ÷ circulating supply. That's the most useful sanity check in crypto: before believing a coin "could reach $1", multiply $1 by its supply and see whether that market cap is plausible. More in market cap explained.
Worked example
A coin trading at $0.50 with 40 billion coins in circulation has a market cap of $0.50 × 40,000,000,000 = $20 billion. For it to reach $10 a coin with the same supply, its market cap would have to be $400 billion, bigger than any cryptocurrency except bitcoin and ether has ever been.
What market cap doesn't tell you
- It isn't the money invested, and holders couldn't all sell at that price: thin order books mean selling would push the price down. See how crypto markets work.
- Coins not yet released aren't in it. For those, use the fully diluted valuation calculator.
- Lost coins are still counted, so the real figure for coins anyone can trade is lower.
Sources
- CoinGecko API: coins markets data (price, circulating supply)
- Methodology: market capitalization and circulating supply (CoinGecko)
Questions
How is crypto market cap calculated?
Multiply the current price per coin by the number of coins in circulation.
How do I work out a coin's price at a certain market cap?
Divide the market cap by the circulating supply. For example, $100 billion ÷ 50 billion coins = $2 per coin.
Why is market cap different on CoinGecko and CoinMarketCap?
They can use slightly different prices and different estimates of circulating supply.
Calculations run in your browser. The only request this page makes is the public CoinGecko price request, which carries nothing you type. Results are estimates for learning and planning, not financial or tax advice. Last reviewed November 4, 2026.