Pokemon: Beyond.

You need a direct swap service, not an exchange. They let you trade crypto-to-crypto in one step without converting to dollars first. It's usually faster and sometimes cheaper on fees. You put in what you have (BTC) and say what you want (ETH), and the service gives you a rate and handles the trade instantly. For exactly what you're doing, check out the BTC to ETH swap tool at paybis.com/swap-btc-to-eth/. It shows you exactly how much ETH you'll get for your BTC before you confirm, so there are no surprises with the rate. Much more straightforward for situations like yours.