Definition
Bits are a sub-unit of bitcoin, where one bit equals one-millionth of a whole bitcoin (0.000001 BTC), or exactly 100 satoshis. The denomination exists to express small amounts of value in friendlier whole numbers, so that day-to-day balances and mining payouts read as hundreds or thousands rather than long strings of leading zeros.
Also known as: microbitcoin (µBTC), µ, or simply “a bit.”
Where bits sit in the bitcoin denomination ladder
Bitcoin is divisible down to the satoshi, the smallest indivisible unit hard-coded into the protocol. There are 100 million satoshis in one bitcoin. A bit slots neatly in the middle of that range: 1 bit = 100 sats = 0.000001 BTC, which also means there are exactly 1,000,000 bits in a single bitcoin. The unit is a human convenience layered on top of the protocol — the blockchain itself only ever counts in satoshis, and wallets simply translate that raw integer into bits, BTC, or sats for display.
Because a bit is a round 100 satoshis, it pairs cleanly with fee math. When you see a transaction fee quoted in transaction fees or in sats-per-vbyte, converting between the two is straightforward arithmetic, which is part of why hobbyists reach for bits when discussing tips, micropayments, and small balances.
Why a home miner cares about bits
If you run an ASIC or a Bitaxe, the unit you actually earn is the satoshi, and bits are just a comfortable way to talk about those earnings. Every payout your mining pool sends originates in the coinbase transaction of a found block — the special transaction that pays out the block reward (the subsidy plus collected fees) to the miner who solved it. The pool then divides that reward among contributors according to its accounting scheme.
For a small rig contributing a sliver of the network hashrate, a daily payout might land in the range of a few hundred to a few thousand bits depending on difficulty, hash price, and your share of the pool. Quoting that figure in bits keeps the number readable: “earned about 1,200 bits today” is easier to reason about than “0.0012 BTC.” Bits also make it natural to track the trickle of value from a single accepted share over time, which is exactly the granularity a lottery mining or solo hobbyist tends to obsess over.
Bits, sats, and the culture of small amounts
Naming conventions for sub-units have shifted over bitcoin’s history. The “bit” denomination gained traction as a way to make prices feel approachable when one whole BTC grew expensive, while the satoshi later became the more common shorthand in mining and Lightning circles. The choice is purely a display preference — no fork, no protocol change, no rule about what a “bit” is lives in the consensus code. Wallets and block explorers each pick a default unit, and many let you toggle between BTC, bits, and sats so the same balance reads three different ways without anything underneath it changing. On the Lightning Network, balances and routing fees are usually measured in sats — and sometimes even millisatoshis — but bits remain a useful middle ground for explaining bitcoin’s divisibility to newcomers who find eight decimal places intimidating.
For sovereign Bitcoiners running their own hardware at home, the practical takeaway is simple: whether your dashboard shows bits, sats, or BTC, you are watching the same protocol-level integers, earned one solved block at a time. If you are sizing up what a home rig might accumulate, our Bitaxe hub walks through realistic open-source mining expectations, and the lineup at D-Central’s miners covers the ASICs that turn electricity into satoshis — and, denominated however you like, into bits.
Related terms: Sats per Terahash, Block Reward, Block Subsidy, Coinbase Transaction, Transaction Fees, Halving
In Simple Terms
A compact encoding of the mining difficulty target stored in each block header.
Bits are a sub-unit of bitcoin, where one bit equals one-millionth of a whole bitcoin (0.000001 BTC), or exactly 100 satoshis. The denomination exists to express small amounts of value in friendlier whole numbers, so that day-to-day balances and mining payouts read as hundreds or thousands rather than long strings of leading zeros.
Also known as: microbitcoin (µBTC), µ, or simply "a bit."
Where bits sit in the bitcoin denomination ladder
Bitcoin is divisible down to the satoshi, the smallest indivisible unit hard-coded into the protocol. There are 100 million satoshis in one bitcoin. A bit slots neatly in the middle of that range: 1 bit = 100 sats = 0.000001 BTC, which also means there are exactly 1,000,000 bits in a single bitcoin. The unit is a human convenience layered on top of the protocol — the blockchain itself only ever counts in satoshis, and wallets simply translate that raw integer into bits, BTC, or sats for display.
Because a bit is a round 100 satoshis, it pairs cleanly with fee math. When you see a transaction fee quoted in transaction fees or in sats-per-vbyte, converting between the two is straightforward arithmetic, which is part of why hobbyists reach for bits when discussing tips, micropayments, and small balances.
Why a home miner cares about bits
If you run an ASIC or a Bitaxe, the unit you actually earn is the satoshi, and bits are just a comfortable way to talk about those earnings. Every payout your mining pool sends originates in the coinbase transaction of a found block — the special transaction that pays out the block reward (the subsidy plus collected fees) to the miner who solved it. The pool then divides that reward among contributors according to its accounting scheme.
For a small rig contributing a sliver of the network hashrate, a daily payout might land in the range of a few hundred to a few thousand bits depending on difficulty, hash price, and your share of the pool. Quoting that figure in bits keeps the number readable: "earned about 1,200 bits today" is easier to reason about than "0.0012 BTC." Bits also make it natural to track the trickle of value from a single accepted share over time, which is exactly the granularity a lottery mining or solo hobbyist tends to obsess over.
Bits, sats, and the culture of small amounts
Naming conventions for sub-units have shifted over bitcoin's history. The "bit" denomination gained traction as a way to make prices feel approachable when one whole BTC grew expensive, while the satoshi later became the more common shorthand in mining and Lightning circles. The choice is purely a display preference — no fork, no protocol change, no rule about what a "bit" is lives in the consensus code. Wallets and block explorers each pick a default unit, and many let you toggle between BTC, bits, and sats so the same balance reads three different ways without anything underneath it changing. On the Lightning Network, balances and routing fees are usually measured in sats — and sometimes even millisatoshis — but bits remain a useful middle ground for explaining bitcoin's divisibility to newcomers who find eight decimal places intimidating.
For sovereign Bitcoiners running their own hardware at home, the practical takeaway is simple: whether your dashboard shows bits, sats, or BTC, you are watching the same protocol-level integers, earned one solved block at a time. If you are sizing up what a home rig might accumulate, our Bitaxe hub walks through realistic open-source mining expectations, and the lineup at D-Central's miners covers the ASICs that turn electricity into satoshis — and, denominated however you like, into bits.
Related terms: Sats per Terahash, Block Reward, Block Subsidy, Coinbase Transaction, Transaction Fees, Halving