1 BTC = 1000 mBTC
1 mBTC = 1000 µBTC (or mybe the new phrase "bits")
1 µBTC = 100 Satoshi

1 Satoshi = 0.01 µBTC
1 µBTC = 0.001 mBTC
1 mBTC = 0.001 BTC

The BTC-symbol can be found 2 buttons above this emote.