Definition
Block Find Probability is the statistical chance that a given miner will solve the next Bitcoin block, equal to that miner’s share of the total network hashrate within any single hashing attempt window. It is the honest math behind every mining payout, whether you point a warehouse at a pool or a single board at solo.
Also known as: block-finding odds, block discovery probability, expected block frequency.
How the probability is calculated
Bitcoin is a proof-of-work lottery. Every hash your hardware computes is one ticket, and a ticket wins only if the resulting block header hashes below the network target. Because double-SHA-256 output is effectively uniform random, your probability of winning per attempt is simply 1 divided by the number of hashes the whole network expects to grind through before one valid block appears. That total is fixed by the current difficulty and the difficulty adjustment that retargets it roughly every two weeks to hold the ten-minute block time.
In practice your block find probability over a span of time is your hashrate divided by the network hashrate, multiplied by the number of blocks the network will produce in that span. A miner controlling one percent of network hashrate will, over a long enough run, find about one percent of blocks. The events follow a Poisson process, so individual outcomes are wildly variable in the short term even when the long-run average is precise. This short-term swing is what miners call luck or variance.
Why every ASIC and home miner cares
For a single ASIC, the raw numbers are humbling. The Vault’s analysis of solo.ckpool.org records a miner with just 6 TH/s facing roughly 1-in-180-million daily odds of finding a block — and yet that miner found one in July 2024. A Bitaxe Supra famously took a full block reward solo in March 2025. The pool itself, running on the order of 165 to 190 PH/s, still averages around 43 days between blocks. That gap between a tiny board and a large fleet is exactly block find probability made visible.
This is why most operators join a mining pool: pooling combines everyone’s hashrate so the group’s probability of finding blocks is high and steady, then splits the block reward by contributed work. Solo mining and lottery mining keep the whole reward but accept brutally low odds — a sovereign bet on variance rather than a steady wage. Either way, the underlying probability is identical; only the payout structure changes.
Squeezing more probability per watt
You cannot change the network, but you can change how many tickets your hardware buys per unit of energy. More real hashrate means a proportionally higher block find probability, which is why tuning matters. Careful undervolting and overclocking through custom firmware let you push more terahashes for the same electricity spend, lifting your efficiency in J/TH and your effective odds. Compare what each rig can deliver on the firmware comparison page, and browse hardware on the Bitaxe hub if you want to take the solo lottery bet yourself.
It is worth standing on the shoulders of the people who built this math. Decades of work on hash functions and the open pool stacks behind solo and pooled mining are what make a single home board a legitimate participant in global consensus. Adding one more independent hasher — your own — is one more layer of decentralization, however long your personal odds happen to be.
Related terms: Network Hashrate, Difficulty, Proof of Work, Solo Mining, Lottery Mining, Block Reward
In Simple Terms
The odds of your miner finding a block based on your share of network hashrate. Low for small miners but never zero.
Block Find Probability is the statistical chance that a given miner will solve the next Bitcoin block, equal to that miner's share of the total network hashrate within any single hashing attempt window. It is the honest math behind every mining payout, whether you point a warehouse at a pool or a single board at solo.
Also known as: block-finding odds, block discovery probability, expected block frequency.
How the probability is calculated
Bitcoin is a proof-of-work lottery. Every hash your hardware computes is one ticket, and a ticket wins only if the resulting block header hashes below the network target. Because double-SHA-256 output is effectively uniform random, your probability of winning per attempt is simply 1 divided by the number of hashes the whole network expects to grind through before one valid block appears. That total is fixed by the current difficulty and the difficulty adjustment that retargets it roughly every two weeks to hold the ten-minute block time.
In practice your block find probability over a span of time is your hashrate divided by the network hashrate, multiplied by the number of blocks the network will produce in that span. A miner controlling one percent of network hashrate will, over a long enough run, find about one percent of blocks. The events follow a Poisson process, so individual outcomes are wildly variable in the short term even when the long-run average is precise. This short-term swing is what miners call luck or variance.
Why every ASIC and home miner cares
For a single ASIC, the raw numbers are humbling. The Vault's analysis of solo.ckpool.org records a miner with just 6 TH/s facing roughly 1-in-180-million daily odds of finding a block — and yet that miner found one in July 2024. A Bitaxe Supra famously took a full block reward solo in March 2025. The pool itself, running on the order of 165 to 190 PH/s, still averages around 43 days between blocks. That gap between a tiny board and a large fleet is exactly block find probability made visible.
This is why most operators join a mining pool: pooling combines everyone's hashrate so the group's probability of finding blocks is high and steady, then splits the block reward by contributed work. Solo mining and lottery mining keep the whole reward but accept brutally low odds — a sovereign bet on variance rather than a steady wage. Either way, the underlying probability is identical; only the payout structure changes.
Squeezing more probability per watt
You cannot change the network, but you can change how many tickets your hardware buys per unit of energy. More real hashrate means a proportionally higher block find probability, which is why tuning matters. Careful undervolting and overclocking through custom firmware let you push more terahashes for the same electricity spend, lifting your efficiency in J/TH and your effective odds. Compare what each rig can deliver on the firmware comparison page, and browse hardware on the Bitaxe hub if you want to take the solo lottery bet yourself.
It is worth standing on the shoulders of the people who built this math. Decades of work on hash functions and the open pool stacks behind solo and pooled mining are what make a single home board a legitimate participant in global consensus. Adding one more independent hasher — your own — is one more layer of decentralization, however long your personal odds happen to be.
Related terms: Network Hashrate, Difficulty, Proof of Work, Solo Mining, Lottery Mining, Block Reward