Irish citizens are most comfortable with the euro currency while Italians had most difficulty with it, according to a poll commissioned by the European commission.
Some 16 per cent of European citizens expressed "a lot of difficulty" with the euro and 33 per cent said they had "some difficulty" paying with the multinational cash.
Some 52 per cent of citizens in the euro zone nations have "no difficulty at all" in using the new currency, up 1 per cent from a similar survey last year, the rounded figures showed.
The Eurobarometer poll highlighted big national differences. In Ireland, 78 per cent had no difficulty, followed by Luxembourg with 71 per cent and Greece with 69 per cent.
However, some 14 per cent of those questioned in Ireland had "a lot of difficulty" with the euro while 9 per cent reported having "some difficulty".
Citizens of the currency bloc's three largest nations struggled the most. Only 35 per cent of Italians were fully at ease with the euro, 42 per cent of French and 56 per cent of Germans.
Across the bloc, 57 per cent of men had no problems using the euro, compared to 45 per cent of women, according to the research. The 15-24 age group was most at ease with the euro, the poll said.
City dwellers generally had less difficulty than those from rural areas, the survey claimed.
The European Commission expressed surprise that only 38 per cent of citizens were aware that they can use bank cards for purchases and cash withdrawals in other euro zone nations without facing extra fees.