A Satoshi (named after mysterious bitcoin creater Satoshi Nakamoto) is the smallest fraction of a Bitcoin that you can own: 0.00000001 BTC. In the future, however, the protocol may be updated to allow further subdivisions should they be needed.
1 BTC = 100,000,000 Satoshis
1 BTC = 1000 mBTC (millibitcoin)
1 mBTC = 100,000 Satoshis
1 μBTC (microbitcoin) = 100 Satoshis
Read Satoshi Nakomoto’s original Bitcoin white paper here!
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