You do not need to buy a whole bitcoin. Every coin splits into 100 million satoshis, and that tiny unit is how fees, payouts and mining revenue are really counted.
By Michal Beno, CEO, OneMiners20 October 2026
A satoshi (sat) is the smallest unit of bitcoin that can be recorded on the blockchain: 0.00000001 BTC, one hundred-millionth of a coin. So 1 BTC = 100,000,000 sats. At a Bitcoin price of about $85,739, one U.S. dollar buys about 1,166 sats, and one sat is worth about $0.00086. The unit is named after Satoshi Nakamoto, Bitcoin's pseudonymous creator.
100,000,000
sats in one bitcoin
1,166
sats per U.S. dollar today
$0.00086
value of one sat
46.4 sats
earned per TH/s per day
BTC $85,739 from CoinGecko, 5 October 2026. Hashprice $0.0398 per TH/s per day, subsidy only, 5 October 2026.
KEY TAKEAWAYS
What is a satoshi?
Bitcoin balances are not stored as decimals. Inside the software, every amount is a whole number of satoshis. When your wallet shows 0.0025 BTC, the blockchain actually records 250,000 sats. The decimal point is just a display choice, like showing a price in dollars instead of cents.
The rule is hard-coded. In Bitcoin Core, the reference software most nodes run, one coin is defined as exactly 100,000,000 of the base unit. Satoshi Nakamoto set that division before the network launched in January 2009, and it has never changed. That gives bitcoin eight decimal places, far more than most currencies, which have two.
Bitcoin units, from biggest to smallest
Bitcoin Core defines 1 BTC as 100,000,000 base units. 'Bits' were proposed in BIP 176 (December 2017). Millisatoshis are used inside Lightning payment channels, not on the blockchain. Checked 6 October 2026.
The total supply is easier to picture in sats too. Bitcoin is capped just under 21 million BTC, which is about 2.1 quadrillion sats. Around 20.09 million BTC, roughly 2.01 quadrillion sats, had been mined by 5 October 2026. Even if bitcoin were very widely used, there would still be hundreds of thousands of sats for every person on Earth.
Why the unit matters
A unit sounds like a detail, but it changes how people think about bitcoin. Here is where sats show up in practice.
Buying a small amount: many newcomers think they have to buy a whole coin. They do not. Buying $20 of bitcoin means owning about 23,327 sats, a real amount you can send and receive.
Fees: network fees are priced in sats per virtual byte (sat/vB). A typical payment of about 141 vB at 2 sat/vB costs 282 sats. See Bitcoin transaction fees explained for how that market works.
The dust limit: nodes will not relay outputs so small that spending them would cost more than they are worth. Under Bitcoin Core's default policy that is 546 sats for an older address and 294 sats for a native SegWit address.
Lightning: the Lightning Network counts in millisatoshis, a thousandth of a sat, so very small payments can be routed precisely.
Mining payouts: pools pay members in sats every day. A small miner's daily payout is usually a five-digit number of sats, not a tidy fraction of a coin.
How many sats does a dollar buy today?
Converting between dollars and sats takes one line of arithmetic. Divide the dollar amount by the Bitcoin price, then multiply by 100 million.
DOLLARS TO SATS
Sats = USD / BTC price x 100,000,000
$1: 1 / 85,739 x 100,000,000 = 1,166 sats
1 sat = 85,739 / 100,000,000 = $0.000857
Common dollar amounts in sats
At BTC $85,739 (CoinGecko, 5 October 2026). The sat count moves every time the price moves.
The number of sats per dollar is a neat way to see Bitcoin's history. As the price has risen, each dollar buys fewer sats. When the price falls, a dollar buys more.
How many sats one U.S. dollar bought
Sats per $1, around the start of October each year
OneMiners calculation from the mempool.space historical price API (around 1 October of each year), and CoinGecko for October 2026 ($85,739), pulled 6 October 2026.
In 2016 a dollar bought more than 160,000 sats. In late 2025, with Bitcoin above $110,000, it bought fewer than 900. Today it buys about 1,166. That swing is also why miners think in sats: the number of sats a machine earns is set by its hashrate, while the dollar value of those sats moves with the market every day.
Worked example: what a Bitcoin miner earns per day in sats
Mining revenue is easiest to understand in sats, because the network pays in bitcoin. The industry's yardstick is hashprice: expected revenue per unit of hashrate per day. On 5 October 2026 it was about $0.0398 per TH/s per day, subsidy only. Converted at $85,739, that is about 46.4 sats per TH/s per day.
DAILY SATS FROM HASHRATE
Sats per day = TH/s x 46.4
S21 Pro: 245 x 46.4 = 11,373 sats
In dollars: 11,373 / 100,000,000 x 85,739 = $9.75
Daily revenue in sats by Bitcoin miner
Bitaxe Gamma 1.2T
Antminer S21 200T
Antminer S21+ Hyd 395TRevenue only, before power and pool fees: TH/s x 46.4 sats, from hashprice $0.0398 per TH/s per day and BTC $85,739, 5 October 2026. At today's numbers; difficulty changes move this every two weeks.
Revenue is only half the picture. Power is paid in local money, usually dollars, so the useful number is what is left in sats after the electricity bill. The same machine can keep most of its sats or give them all back, depending on the power price.
Antminer S21 Pro: sats kept per day after power
Revenue minus power cost, in sats per day
Antminer S21 Pro, 245 TH/s, 3,675 W (88.2 kWh a day). Power cost converted to sats at BTC $85,739. Hashprice $0.0398 per TH/s per day, 5 October 2026. Excludes hardware and pool fees. OneMiners calculation.
At $0.048 per kWh, the S21 Pro spends about 4,938 sats of its 11,373-sat daily revenue on power and keeps about 6,435. At $0.10 per kWh it keeps only about 1,086. Over a year at the lower rate, that is roughly 2.3 million sats, about 0.023 BTC, if hashprice stayed where it is. It will not stay exactly there: difficulty usually rises over time, which trims the sats per terahash.
Sats earned per day by Bitcoin miner
Revenue before power, sats per day
TH/s x 46.4 sats per TH/s per day, from hashprice and BTC price on 5 October 2026. Revenue only. OneMiners calculation.
Antminer S21 Pro 245T$2,299Hashrate245 TH/sEfficiency15.00 J/THPower draw3,675 WBreak-even power$0.111/kWhNet/day at 4.80c$5.52View on OneMiners
Antminer S21 XP Hyd 473T$6,199Hashrate473 TH/sEfficiency12.00 J/THPower draw5,676 WBreak-even power$0.138/kWhNet/day at 4.80c$12.29View on OneMiners
Antminer S23 Hyd 580T$12,299Hashrate580 TH/sEfficiency9.50 J/THPower draw5,510 WBreak-even power$0.175/kWhNet/day at 4.80c$16.74View on OneMiners
Three efficiency tiers on the OneMiners catalogue, live prices 6 October 2026. Card figures are in dollars at $0.048 per kWh and use hashprice including recent fees. At today's numbers, not a promise of future revenue.
Where the name 'satoshi' came from
Satoshi Nakamoto never named the smallest unit. The 100-million split existed in the code from the start, but the word came from the community a couple of years later.
October 2008: the white paper
Satoshi Nakamoto publishes the Bitcoin white paper. The early code already divides one coin into 100,000,000 base units.
January 2009: the network launches
The first block is mined on 3 January 2009. The unit exists but has no popular name.
15 November 2010: a first suggestion
On the BitcoinTalk forum, a user called ribuck suggests that one hundredth of a bitcoin be called a 'satoshi'.
March 2011: the name moves down
Ribuck revises the idea: the one hundred-millionth unit should be the satoshi. The forum adopts it, as a tribute to Bitcoin's creator.
December 2017 onward
BIP 176 proposes 'bits' for 100 sats, Lightning uses millisatoshis, and wallets increasingly show balances in sats.
Today 'sats' is everyday Bitcoin language. People talk about 'stacking sats' when they buy small amounts regularly, and the Ordinals protocol, launched in January 2023, even gives every individual sat a serial number based on the order it was mined.
Sats and mining: why miners think in small units
For a miner, sats turn an abstract business into a simple daily count. Each machine produces a predictable stream of sats per terahash, which only changes when difficulty or fees change. The power bill turns that stream into a profit or a loss. Owning more terahash at a lower power price means keeping more sats.
That is the logic behind hosting. A hosted Bitcoin miner is owned by you and run in a professional facility that charges a fee per kWh. OneMiners hosts in Nigeria, Ethiopia, Norway, Paraguay, Canada, Dubai, Texas, Georgia USA and more. You can compare sites on the hosting centers page, or see the current Bitcoin miners and what each one earns in the mining calculator.
Thinking in sats strips the noise out of mining. Hashrate decides how many sats a machine earns; power price decides how many it keeps. OneMiners focuses on the second number, with hosting from $0.048 per kWh and from $0.0364 per kWh on a 7-year prepaid contract. Hosted miners also come with a 7-year warranty covering defects, not normal wear.
Frequently asked questions
How many satoshis are in one bitcoin?
Exactly 100,000,000. One satoshi is 0.00000001 BTC.
How much is one satoshi worth in dollars?
About $0.00086 at a BTC price of $85,739 (5 October 2026). One dollar buys about 1,166 sats.
Can you buy less than one bitcoin?
Yes. Exchanges let you buy any dollar amount, for example $10 is about 11,663 sats. You never need to buy a whole coin.
Is there anything smaller than a satoshi?
Not on the blockchain. Lightning payment channels track millisatoshis, a thousandth of a sat, but on-chain balances settle in whole sats.
How many sats does a Bitcoin miner earn per day?
At today's numbers, about 46 sats per TH/s per day before costs. An Antminer S21 Pro at 245 TH/s earns about 11,373 sats a day.
Who named the satoshi?
BitcoinTalk user ribuck, first in November 2010 for a hundredth of a coin, then in March 2011 for the hundred-millionth unit. It honours Satoshi Nakamoto.
See how many sats a Bitcoin miner earns, then compare hosting from $0.048 per kWh.
Open the mining calculatorSee hosting locationsSOURCES AND DATA
- BTC price $85,739: CoinGecko, 5 October 2026
- Hashprice $0.0398 per TH/s per day (subsidy only) and bitcoin mined (20.09 million): mempool.space and blockchain.info, 5 October 2026
- 1 BTC = 100,000,000 base units: Bitcoin Core source code (amount.h), checked 6 October 2026
- Naming history (ribuck, 15 November 2010 and March 2011), millisatoshis, BIP 176 bits (December 2017): Bitcoin Wiki, 'Satoshi (unit)', checked 6 October 2026
- Dust thresholds of 546 and 294 sats: Bitcoin Core default relay policy, checked 6 October 2026
- Historical BTC prices around 1 October 2016 to 2025: mempool.space historical price API, pulled 6 October 2026
- Ordinals launch, January 2023: Ordinals protocol documentation and industry coverage
- Miner specs and prices: OneMiners catalogue, 6 October 2026
- Hosting rates: published OneMiners location pages
Michal Beno
CEO of OneMiners, the global Bitcoin mining hosting and hardware platform with 15 published hosting locations, 7-year fixed electricity contracts and a 7-year hardware warranty. He writes about the economics of industrial Bitcoin mining.
Informational only, not financial advice. Figures are a snapshot from public market data and news reports as of 5 October 2026 and can change quickly. Crypto prices can fall as well as rise. No return is offered or implied. Do your own research.
