Crypto Gloss

Satoshi

A satoshi (plural: satoshis, often shortened to sats) is one hundred-millionth of a bitcoin: 1 BTC equals 100,000,000 sats. It is the smallest unit used for ordinary Bitcoin base-layer amounts; a satoshi is a unit of BTC, not a separate cryptocurrency.

How Satoshis Work

Bitcoin software represents amounts in integer satoshis rather than storing arbitrary decimal fractions of a BTC. That makes common conversions precise: 1 sat = 0.00000001 BTC; 1,000 sats = 0.00001 BTC; and 100,000,000 sats = 1 BTC. A wallet or exchange may show a balance in BTC, sats, or another denomination while referring to the same underlying amount.

Lightning payment protocols can represent some off-chain payment amounts at millisatoshi precision: one millisatoshi is one-thousandth of a satoshi. That accounting precision is used within Lightning channels and invoices; Bitcoin base-layer transaction outputs use whole satoshis.

Why People Use Sats

Small BTC amounts can be easier to read as whole sats than as a decimal with several leading zeroes. The display choice is a convention, not a change to Bitcoin’s supply or value. “Stacking sats” is informal community language for accumulating small BTC amounts over time; it does not describe a protocol feature or guarantee an investment result.

Common Misconceptions

“A satoshi is a separate coin.” A satoshi is simply a denomination of bitcoin, much like a cent is a denomination of a dollar.

“The Lightning Network can send any fraction of a satoshi.” Lightning protocol amounts may use millisatoshis, but the specification does not allow transferable amounts smaller than one millisatoshi. Base-layer Bitcoin outputs use whole sats.

“Every exchange lets you buy exactly one sat.” Exchanges and wallets set their own order minimums, fees, and display precision. The Bitcoin unit conversion does not promise that a service will sell or transfer a particular minimum.

Criticisms

  • Denomination preferences differ: Some people find sats intuitive for small amounts; others prefer BTC, bits, or a mix. A display preference does not establish which unit every service should use.
  • Large sat figures can be awkward: For larger balances, BTC may be easier to scan than a number with many digits.

Social Media Sentiment

  • BitcoinTalk forum poll (December 2020): A small poll received 22 votes on whether bits, sats, millibits, or BTC should be the preferred denomination. Replies disagree: some like sats for small values, while others prefer BTC or bits for familiar display and fewer digits. This old forum discussion shows a limited preference debate, not current or universal usage. Read the denomination discussion.

Last updated: 2026-10

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