I wrote a little app that will take the price from http://coinbase.com (more can be added eventually) and calculate the different denominations (BTC, mBTC, uBTC and satoshi) of a given value.

Check out more information at the Github Page: https://github.com/tvl83/btccalc

Downloads
Windows http://bitcalc.thomasle.info/btcalc-win.zip
Linux 32-bit http://bitcalc.thomasle.info/btcalc-linux32.zip
Linux 64-bit http://bitcalc.thomasle.info/btcalc-linux64.zip
Mac http://bitcalc.thomasle.info/btcalc-osx.zip

Note: the size of the download is a little large for such a small and simple app. This is because I use node-webkit and it has overhead.

I would love any feedback.