One Bitcoin can be divided into 100 million smaller units called Satoshis.

The Satoshi is named after Satoshi Nakamoto, the pseudonymous creator of Bitcoin who published the original whitepaper in October 2008. This unit represents the smallest possible denomination of Bitcoin recorded on its blockchain. By dividing one Bitcoin into 100 million units, the system ensures that the currency remains practical for everyday transactions even if the price of a single coin reaches millions of dollars.The specific ratio of 100 million units per Bitcoin was hardcoded into the software by Nakamoto during the network's early development. This design choice provides a massive total supply of 2.1 quadrillion Satoshis, given the ultimate limit of 21 million Bitcoins. This granularity is essential for microtransactions and for paying the small transaction fees required to process data on the network.In the cryptocurrency community, the term is often shortened to "Sats." Many investors use the phrase "stacking sats" to describe the process of regularly buying small amounts of Bitcoin over time. This divisibility is a key technical feature that distinguishes digital assets from physical assets like gold, which are much harder to divide into microscopic, precise portions for small-scale trade.