There's a catch with metric conversion on google.com.au - it requires US spelling (eg "meters" instead of "metres") to work, even though the logo above the search box clearly says Google Australia.......
Google's results pages are becoming so crammed up with supplementary crap it's a wonder anyone even gets any traffic any more.
I guess that's one good thing about adult terms - you probably won't have many youtube vids, or definitions, in the results pages :D