Exchanging US currency into foreign currency can be problematic and at a cost. Charging does avoid converting a lot of cash, but depending on your card – it may still involve exchange fees, but usually less than exchange booth rates. The best deal I’ve found is an ATM card. I have a Credit Union ATM card that is affiliated with a global network. My CU allows 5 free withdrawals a month. TIP: Use an ATM card and avoid fees and get the exact exchange rate. But make sure you check with your credit union or bank as my experience shows not all fine print is the same!