That's a crucial consideration for any business accepting crypto payments. I recently came across an insightful article on BitClassic that discusses this very topic: "Real-Time Currency Conversion in Cryptocurrency and UniPayment's Application in Bitcoin Payments."
https://bitclassic.org/real-time-currency-conversion-in-cryptocurrency-and-unipayment-s-application-in-bitcoin-payments/ . The piece explains how real-time conversion tools instantly convert Bitcoin to fiat currency at the moment of transaction, protecting merchants from volatility. It specifically highlights UniPayment's system, which locks in exchange rates during checkout, ensuring you receive exact fiat amounts regardless of Bitcoin price fluctuations. The article also covers how these systems handle different currencies and settlement times, which is particularly useful for international businesses.