The converter uses a recent BTC/USD reference price supplied by CoinGecko and clearly labels its source and update time.
BTC to USD
Bitcoin amount × BTC/USD rate
USD to BTC
US-dollar amount ÷ BTC/USD rate
Rate retrieval and caching
BitcoinToDollar.com retrieves the rate server-side and caches it briefly to improve reliability and avoid unnecessary requests. Amounts entered in the calculator are calculated locally in the browser.
Why prices differ between exchanges
There is no single official Bitcoin price. Trading venues have separate order books, liquidity and spreads. The displayed value can therefore differ from an executable exchange quote and excludes trading fees, withdrawal fees, taxes and bank charges.
Data source: CoinGecko. BitcoinToDollar.com is not affiliated with CoinGecko.