I had occasion recently to buy something from a French web site. I
charged in to my MBNA card.
The exchange rate was slightly better (by a few cents in the total)
than the exchange rate quoted by Google. But on the credit card bill
there was an additional line item totaling 3 percent of the charge for
a "FOREIGN TRANSACTION FE - FTF".
You pay the same fee if you purchase something in a foreign country using
your card. It is, in my view, a rip-off.
If you do a lot of foreign transactions, you should get a different credit
card that charges a lower foreign transaction fee.
Generally, these fees are not advertised but are somewhere in the "fine
print" of the user agreement. You may have to call the credit card company
and ask them what there fee is.
Capital One cards do not apply a Foreign Transaction Fee. However, they
sometimes use a slighty different exchange rate.
Example - $1.11 vs $1.14 US/CAN on my recent Canadian purchhases.
IJS