Me too. Metric all the way.

By the way, the most convenient conversion tool is google.com. If you just type 24in in cm; or 35cm in in; or 30gallons in litres; or 5oz in grams or whatever it is you want to convert, then hit search - it recognises that you want to convert units and it does it for you. It will recognise unit abbreviations too, so instead of 'litres' you can just type 'l'.

I don't work for google or anything, but I do think they make life a little easier!