A Satoshi (sat) is the smallest unit of Bitcoin, named after Bitcoin’s pseudonymous creator Satoshi Nakamoto. One Bitcoin equals 100,000,000 (100 million) satoshis, making a single satoshi worth 0.00000001 BTC. This unit of measurement exists because Bitcoin is divisible to 8 decimal places, allowing microtransactions and enabling Bitcoin to function as a currency even as its price per whole coin rises into the tens or hundreds of thousands of dollars.
As Bitcoin’s price appreciates over time, denominating small amounts in satoshis becomes more practical than fractions of a BTC. At $60,000 per Bitcoin, one satoshi is worth $0.0006. The phrase “stacking sats” has become popular in the Bitcoin community — referring to the habit of accumulating small amounts of Bitcoin regularly, regardless of price, through DCA strategies.
The Lightning Network — Bitcoin’s Layer 2 payment protocol — operates primarily in satoshis, enabling payments as small as 1 sat for micropayments, content tipping, and streaming money. Some Bitcoin maximalists track their wealth in satoshi terms rather than fiat, using “sats” as their preferred unit of account.
The identity of Satoshi Nakamoto — whether an individual or group — remains one of the greatest mysteries in technology. Nakamoto communicated via email and forums until 2010, then disappeared. Their wallets holding approximately 1 million BTC have never moved.
Example: At $100,000 per BTC, one satoshi = $0.001. A $5 coffee costs 5,000 sats. A $0.001 Lightning Network micropayment tip to a content creator costs exactly 1 sat.
Learn more: Investopedia — Satoshi Definition
