If any of you are bad at remembering unit conversions like me, then you'll probably find this useful. Looks damn nice too. Finally apps are starting to look like they came out recently instead of 5 years ago. There's a free and 99 cent version with extra features. If you like the free one, i suggest buying the 99 cent version as a donation and support for the developer!
Read more:
http://pocketnow.com/software-1/uconvert