Satoshi
Also known as: Sat, Bitcoin Subunit, Smallest BTC Unit
The smallest unit of Bitcoin, named after its creator, representing 0.00000001 BTC.
A satoshi is the smallest indivisible unit of Bitcoin, equal to 0.00000001 BTC. Named after Bitcoin's creator Satoshi Nakamoto, this unit allows microtransactions and fine-grained pricing. The use of satoshis (or 'sats') enables easier transaction denomination as Bitcoin’s value increases. The term is widely used in wallets, Lightning Network apps, and on exchanges that support BTC payments. Sats are essential for increasing Bitcoin's usability in everyday purchases and micro-payments, especially on Layer 2 scaling solutions.