• Wei is to Ethereum the same way Satoshi is to Bitcoin — both units are the smallest unit a user can transact with.

  • The US dollar is only divisible into 100 units—pennies—, and the penny is the indivisible (atomic) unit of the US currency.
  • Wei is named after Wei Dai, best known as the creator of Bitcoin’s predecessor “b-money” and as the developer of the Crypto++ library.