You should ideally spend your coins, change them into bills, or give them away before you head into a country where they’re worthless.Avoid having a lot of unused currency left over when you cross borders between countries that use different currencies.Expect to be shortchanged by banks, ticket booths, and restaurants if you haven’t figured out the currency conversion.Use your credit card to get cash only in emergencies because you’ll have to pay a sizeable cash-advance fee.To avoid getting fleeced, the best way to convert INR to Euro is at ATMs or by using your debit card.