Sats meaning: what is a satoshi?

What a satoshi is

Bitcoin can be split into eight decimal places. The smallest possible amount, 0.00000001 BTC, is called a satoshi, and "sats" is the everyday plural. The bitcoin software itself counts everything in satoshis; the "bitcoin" figure you see in a wallet is just that number divided by 100 million.

The name honours Satoshi Nakamoto, the name used by the person or group who published the bitcoin white paper in 2008 and released the software in 2009. Nakamoto stopped communicating publicly around 2011, and who they are remains unknown. The community began calling the smallest unit a "satoshi" in the early years, and the name stuck.

Used in a sentence: "The fee on that transaction was about 2,000 sats." Or: "I put a few thousand sats aside every week."

Converting sats to bitcoin

The conversion never changes, because it is set by how bitcoin is built:

To go from sats to BTC, divide by 100,000,000. To go from BTC to sats, multiply by 100,000,000. The value of a sat in dollars or pounds does change, because it moves with the bitcoin price: one sat is always one hundred-millionth of whatever one bitcoin is worth. If bitcoin were priced at $50,000, one sat would be $0.0005 and 10,000 sats would be $5.

Some wallets also show smaller units used on the Lightning Network, a payment layer built on bitcoin, which can track thousandths of a sat internally. Those are accounting units; the smallest amount that can be recorded on the bitcoin blockchain itself is one sat.

Why people count in sats

Thinking in sats has a few practical and psychological effects:

• Readable numbers. 25,000 sats is easier to read and type than 0.00025 BTC, and harder to get wrong by a decimal place.
• Fees. Bitcoin network fees are quoted in sats per virtual byte (sat/vB), a measure of how much you pay for the space your transaction takes in a block.
• Small purchases. For tips, small payments and Lightning transfers, sats are the natural unit.
• "Stacking sats". The phrase means buying small amounts of bitcoin regularly, rather than trying to buy a whole coin or time one big purchase.

Counting in sats can also change how a price feels. A whole bitcoin can seem out of reach, while a few thousand sats feels affordable, even though the value is the same either way. The number of units you own says nothing about whether the price is high or low.

Sats from a trader's point of view

For risk management, what matters is the money at stake, not the unit. A position of 1,000,000 sats moves exactly as much in value as a position of 0.01 BTC. Size it in your own currency first, then convert, so a large-looking number of sats does not hide how much you are exposed. The risk management for crypto positions lesson covers position sizing, and bitcoin and the majors explains what drives bitcoin itself.

When you withdraw or send sats, the usual care applies: check the address and the network, and send a small test amount first to a new address. If you plan to hold for a long time, the hot wallet vs cold wallet page explains your storage options.