And here's a nifty piece of freeware you can download and perch on your desktop. It's conversions for all sorts of measurements between each other. This can save one buckets full of time and aggravation.
Enjoy - it's Free!
http://joshmadison.com/article/convert-for-windows
P.S. - I swept this with AVG Pro antivirus. It's clean - no worms or bots will attack you.