It is crazy that we live in the only country in the world that does not use the metric system in everyday life. Yet, as Bob T. says, RDs want miles marked, not kilometers. Bob has encouraged me to "go metric", which I understand. I just encountered an excellent object lesson in converting counts to feet or meters - I had to replace a Jones Counter after the first measurement of a half marathon this summer when it broke while I was measuring another course in between rides one and two of the half. The only way to make sense of the data, of course, was to convert everything to the common denominator.
For those of us who are not aware, there is a handy little free tool called "CONVERT.exe" that instantly converts feet to meters, kilometers to feet, and anything else you might want to compare. it is available at CONVERT.exe Download Site .