Free tool
Crypto Market Cap Calculator
Model what price a coin would reach at any target market cap, or the implied market cap at any target price. Switch into the "if X had the market cap of Y" mode to compare against Bitcoin, Ethereum, or Solana with one click. Useful for sanity-checking moonshot price targets you see on Twitter, sizing a position by valuation rather than spot price, and comparing tokens with very different supply schedules.
A $0.001 token isn't "cheap" if its circulating supply is in the trillions — it could already be valued higher than a $100,000 coin with a few million units in circulation. Market cap is the only fair comparison; this crypto market cap calculator converts back and forth so you can stop confusing price with value.
If BTC had the market cap of
Current BTC supply: 19.90M
Current market cap: $1.25T (spot × supply)
Implied price
$50.25
0.1% of of today's spot price.
- BTC circulating supply
- 19.90M
- Target market cap
- $1.00B
marketCap = price × circulatingSupply. Supply snapshot — projected price at a market cap is a thought experiment, not a forecast.
How it's calculated
Market cap = circulating supply × spot price. From there it's pure algebra: target price = target market cap ÷ supply, and target market cap = target price × supply. Supply for each coin is taken from a snapshotted table refreshed quarterly (see src/lib/tools/supply.ts for the values and dates). Live spot price comes from the Binance ticker every 60 seconds.
Fully diluted valuation (FDV) uses maximum supply instead of circulating supply — relevant for tokens with large unlocked vesting still ahead. The benchmark chips on the form use circulating market cap (apples-to-apples with the input coin) rather than FDV.
Worked example
ADA has ~36B circulating supply. To match Ethereum's roughly $360B market cap, ADA would need a price of ~$10. That's a useful sanity check: it doesn't mean ADA will get there, but it shows the price level required if the market valued the project equivalently to Ethereum today.
Flip the question for Bitcoin: at the current ~19.9M circulating supply, what price does BTC need to reach to hit a $5 trillion market cap? Answer: ~$251,000. That single number tells you whether the bull-case price targets you see online are arithmetically plausible (a few multiples of today's market cap) or wildly off (10× current gold's total above-ground value).
Coin Market Cap Calculator: price vs value
The most common mistake newcomers make is comparing crypto prices directly. A $50,000 BTC vs a $5 LINK "feels" different but tells you nothing about value — Bitcoin's circulating supply is ~19.9M, Chainlink's is ~626M, so a side-by-side at today's prices has Bitcoin at roughly 320× LINK's market cap. The coin market cap calculator removes the supply confound by letting you set a target cap (or a target price) and compute the other side. It's the same arithmetic Coinmarketcap.com and Coingecko show, exposed as a what-if tool.
Marketcap Calculator: comparing across tokens
To compare "if my altcoin reached half of Bitcoin's market cap" type questions, set the target cap to half of the current BTC market cap and read the implied price. The calculator surfaces current market cap of supported coins as benchmark chips on the form — one click drops in BTC's, ETH's, or SOL's market cap as the target. Useful for setting realistic price targets ("could SOL realistically match ETH's market cap?") and for spotting cases where the target you've seen is implicitly asking for a 50× total market cap expansion.
Crypto Market Cap and circulating supply
Circulating supply changes over time — new coins get mined (Bitcoin), staked-and-minted (Ethereum, Solana, Cardano), or vest from team / investor allocations (almost every recent launch). The calculator's supply column is a quarterly snapshot; for most coins it's accurate to within 1–2%. Bitcoin grows about 140 BTC per day post-2024 halving — slow enough that the snapshot is stable; for fast-vesting tokens, treat the implied price with a wider error bar, or check the live circulating supply on the project's official statistics page before relying on the number.
FAQ
How is crypto market cap calculated?
Market cap = current price × circulating supply. A coin at $2 with 100 million coins circulating has a $200 million market cap. It measures total value, not price alone.
What price would a coin reach at a given market cap?
Target price = target market cap ÷ circulating supply. Enter a market cap you want to model and the calculator shows the price the coin would need to hit, holding supply constant.
What is the 'if X had the market cap of Y' calculation?
It estimates a coin's price if it grew to match another coin's market cap. The tool divides that larger market cap by your coin's supply to show the hypothetical price — useful but speculative.
Why does circulating supply matter?
A low price doesn't mean a coin is 'cheap.' A coin with a huge supply can have a low price but a large market cap. Always compare market cap, not price, between coins.
What's the difference between circulating and fully diluted market cap?
Circulating cap uses coins in circulation now; fully diluted valuation (FDV) uses the maximum future supply. FDV is usually higher and shows potential dilution.
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