What is a satoshi?
Written by an ex-institutional trader. What a satoshi (sat) is, how many there are in a Bitcoin, why the unit matters, and a free live converter to switch between satoshis, BTC and AUD or USD.
Direct answer
A satoshi (or "sat") is the smallest unit of Bitcoin: one hundred-millionth of a single Bitcoin, or 0.00000001 BTC. Just as a dollar divides into 100 cents, one Bitcoin divides into 100,000,000 satoshis. The unit is named after Bitcoin's pseudonymous creator, Satoshi Nakamoto.
Satoshis matter because a whole Bitcoin is expensive, so most real activity happens in sats. They let you buy, send and think about Bitcoin in small, everyday amounts, which is why the phrase "stacking sats" describes steadily accumulating Bitcoin a little at a time. Use the converter on this page to switch between satoshis, BTC and Australian or US dollars at the live price.
What a satoshi is
A satoshi (or "sat") is the smallest unit of Bitcoin: one hundred-millionth of a single Bitcoin, or 0.00000001 BTC. Just as a dollar divides into 100 cents, one Bitcoin divides into 100,000,000 satoshis. The unit is named after Satoshi Nakamoto, the pseudonymous creator of Bitcoin.
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How many in a Bitcoin
There are exactly 100,000,000 satoshis in one Bitcoin. That fixed divisibility is built into Bitcoin, so you never have to buy a whole coin. A few handy reference points:
- 1 satoshi = 0.00000001 BTC
- 100 satoshis = 0.000001 BTC
- 100,000 satoshis = 0.001 BTC
- 1,000,000 satoshis = 0.01 BTC
Satoshi converter
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Why sats matter
A whole Bitcoin is expensive, so thinking in whole coins is impractical for everyday amounts. Satoshis fix that: they let you buy, send and price Bitcoin in small, intuitive units. When you spend a few dollars on Bitcoin, you are really buying thousands of sats. The unit also makes micro-payments possible, especially over the Lightning Network, where tiny amounts of sats can be sent instantly and cheaply.
Stacking sats
"Stacking sats" is the popular phrase for steadily accumulating Bitcoin in small amounts rather than buying a whole coin at once. It usually pairs with dollar cost averaging: buying a fixed dollar amount on a regular schedule, so you build a position gradually through the ups and downs.
For Australians, the practical route is a recurring buy on a reputable AUSTRAC-registered exchange, funded with AUD. Remember that selling sats later is still a taxable event.
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This is general information, not financial advice. Last reviewed: 2026-06-02.
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Frequently asked questions
What is a satoshi in simple terms?
A satoshi, or sat, is the smallest unit of Bitcoin, equal to one hundred-millionth of a Bitcoin (0.00000001 BTC). Just as a dollar is made up of 100 cents, one Bitcoin is made up of 100,000,000 satoshis. It is named after Satoshi Nakamoto, the pseudonymous creator of Bitcoin. Because a whole Bitcoin is expensive, most everyday amounts of Bitcoin are easier to think about in sats.
How many satoshis are in one Bitcoin?
There are exactly 100,000,000 satoshis in one Bitcoin, which is one hundred million. So one satoshi is 0.00000001 BTC. This fixed divisibility is built into Bitcoin and means you never have to buy a whole coin; you can own and transfer tiny fractions. For example, 100,000 satoshis is 0.001 BTC, and 1,000,000 satoshis is 0.01 BTC.
How much is a satoshi worth in Australian dollars?
The value of a satoshi changes constantly with the Bitcoin price. Because there are 100 million sats in a Bitcoin, you divide the AUD Bitcoin price by 100 million to get the value of one sat. If Bitcoin is worth A$150,000, then one satoshi is worth A$0.0015, or about a seventh of a cent. Use the live converter on this page to see the current value in AUD or USD.
Why is it called a satoshi?
The unit is named after Satoshi Nakamoto, the pseudonymous person or group who created Bitcoin and published the original 2008 white paper. The true identity behind the name has never been confirmed. Naming the smallest unit after the creator is similar to how other systems honour their founders, and the term has become standard across the Bitcoin world, usually shortened to sats.
What does stacking sats mean?
Stacking sats is a popular phrase for steadily accumulating Bitcoin in small amounts over time, rather than trying to buy a whole coin or time the market. It usually goes hand in hand with dollar cost averaging, where you buy a fixed dollar amount on a regular schedule. The idea is to build a Bitcoin position gradually and consistently, one batch of satoshis at a time.
