This is a really swell training tool. Since I've never had an official 5 or 10k time, I was looking for a target pace for my repeats. I just inputted my half-marathon time, and it went to work. I am pleased to know that I can run faster than the predicted times this calculator gave me, but it's a pretty good approximation. Try it for yourself if you're short-distance challenged like me! Link: http://www.mcmillanrunning.com/rununiv/mcmillanrunningcalculator.htm
my musings since 2006