Ireland has converted mostly to the metric system, we switched to kilometers for speed limits in 2005. To be honest you get used to it pretty quickly. There are a number of items, particularly those that are traded with our neighbours in the UK that are shown as both metric and imperial. You still get a pint of Guinness in the pub but all bottles and cans of beer are in metric.

http://en.wikipedia.org/wiki/Metrication_in_Ireland