Dimensional analysis is an important tool, but more important is to learn to THINK in metric. It's easier than you think, once you learn that everything is all related. This is especially important in medication dosing. Please take a few minutes to see a talk given on metric by the late Pat Naughton. While not specifically about nursing, he touches upon use of metric in pediatric nursing. His talk beautifully explains how the metric system is a SYSTEM, it it will make much more sense once you see this. Hope this helps! Scott