About MarketCapCalculator

MarketCapCalculator is a free reference tool for understanding market-cap math across crypto and stocks. No logins, no ads, no tracking — just fast, live data.

Prices for crypto come from Binance's public WebSocket; supply and metadata come from CoinGecko. Stock prices come from Finnhub's free-tier /quote endpoint on a round-robin schedule (about 9 minutes per ticker).

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