While native Italians do not always leave large tips, and in some cases, tip at all according to Avventure Bellissime, "a quick way to make friends in Italy is to leave a tip."
Given that customarily, one tips a lower amount in Italy than in America, you may want to base your tip amount on 10 - 15%. Use our handy calculator at left to see how this might work out in a restaurant when you are dining with a group of friends, and splitting the bill.