I sometimes sell some of my BTC to have fiat money for daily expenses. At first, I didn't know how to safely calculate the equivalent in dollars and avoid unnecessary commissions, but I found a convenient service:
https://paybis.com/btc-to-usd/ . It shows the current exchange rate and allows you to quickly convert BTC to dollars. After a few transactions, I felt more confident and now I can easily plan my finances and purchases in the US.
